Field dictionary

Every column of the three CSV files of 2026-10-27 · 838 sites, from its schema.json, with plain-language descriptions and an example value. Empty values mean unknown, never zero. The same contract is machine-readable as JSON Schemas and in datapackage.json. How the identifiers (site_id, project_id, evidence_id) are formed and how long they stay valid is explained in the methodology.

sites.csv #

Column	JSON name	Type	Empty allowed	Description	Example
site_id	site_id	string	no	Atlas identifier of the physical site (vcc-site-…), derived deterministically from physical_site_stable_key. Primary key.	vcc-site-00432e4e9c8e2d91ff76
physical_site_stable_key	physical_site_stable_key	string	no	Stable curation key of the physical site or parent campus, for example curated:<slug>. It groups the projects at one site; it is not a claim of global de-duplication across other databases.	imported:semiconductor-atlas:openai-stargate-milam-county
name	name	string	no	Site or campus name as given by the selected source evidence. Not a legal entity name.	Stargate Milam County (SB Energy campus)
country	country	string	no	Name of the country or territory where the site is located.	United States
country_iso_a2	country_iso_a2	string	no	ISO 3166-1 alpha-2 code of the country or territory.	US
latitude	latitude	number	no	WGS 84 latitude, in decimal degrees, of the site's display anchor. For a Point it repeats the point locator, with the same scope and precision limits (some point locators are themselves source-derived centroids). For a Polygon or MultiPolygon it is only a convenient marker position for the shape, usually but not always inside it, and not a surveyed point; geometry_json is the locator. Never use it as a building or construction location.	30.7627
longitude	longitude	number	no	WGS 84 longitude, in decimal degrees, of the site's display anchor (see latitude).	-96.9982
geometry_json	geometry	geojson_geometry	no	GeoJSON geometry (WGS 84, longitude then latitude) of the site's reviewed locator or official boundary: a Point, Polygon or MultiPolygon. A locator only locates the site; it is not a building footprint, construction extent or surveyed boundary. Even an official boundary is a parcel or permit boundary, not the area under construction.	{"coordinates":[-96.9982,30.7627],"type":"Point"}
geometry_type	geometry_type	string	no	GeoJSON type of geometry_json: Point, Polygon or MultiPolygon.	Point
geometry_source_entity_kinds_json	geometry_source_entity_kinds	json_array	no	JSON array of what the source geometries describe (campus, facility, building, project or address_area), one entry per distinct value across the site's projects.	["project"]
geometry_derivations_json	geometry_derivations	json_array	no	JSON array of how the published geometry was derived from its source, for example direct_geometry or coordinates_to_point. Free-form review codes, shown verbatim.	["imported_reference_point"]
geometry_methods_json	geometry_methods	json_array	no	JSON array of the source-specific methods used to obtain the geometry. Free-form review codes, shown verbatim.	["imported_reference_point"]
geometry_scope_classes_json	geometry_scope_classes	json_array	no	JSON array of scope classes saying what the geometry represents, for example a shared-campus reference point or an official address locator. Free-form review codes, shown verbatim.	["admin2"]
geometry_authority_classes_json	geometry_authority_classes	json_array	no	JSON array of the authority of the geometry sources: official_source, community_source or community_mapped.	["compiled_reference"]
geometry_use_scopes_json	geometry_use_scopes	json_array	no	JSON array of how the geometry may be used: official_boundary, campus_locator, project_locator or reviewed_site_locator. Every scope except official_boundary is a locator, not a footprint.	["admin2_context"]
geometry_precision_scopes_json	geometry_precision_scopes	json_array	no	JSON array of plain-language statements of what the geometry does and does not represent.	["Milam County centroid from OpenStreetMap Nominatim. Sources name only the county, which Epoch AI places about 70 miles northeast of Austin; no site address was found."]
horizontal_uncertainty_metres	horizontal_uncertainty_metres	number	yes	Stated horizontal uncertainty of the locator in metres, when a bounded value is known. Empty means unknown, never zero.	187
horizontal_uncertainty_unknown_reason	horizontal_uncertainty_unknown_reason	string	yes	Why no numeric horizontal uncertainty is given. Empty when horizontal_uncertainty_metres is set.	The source record provides no measured horizontal uncertainty; original coordin…
geometry_evidence_ids_json	geometry_evidence_ids	json_array	no	JSON array of evidence_id values (evidence.csv) of the sources that supplied the site geometry.	["882a168d-1e56-5d20-99d6-d4e41e2c0cb6"]
project_count	project_count	integer	no	Number of projects linked to the site in this data snapshot.	1
project_ids_json	project_ids	json_array	no	JSON array of the project_id values (projects.csv) linked to the site.	["316e6c68-21e0-50d1-973e-d4fa5847a99f"]
project_stable_keys_json	project_stable_keys	json_array	no	JSON array of the stable curation keys of the projects linked to the site.	["imported:semiconductor-atlas:openai-stargate-milam-county"]
statuses_json	statuses	json_array	no	JSON array of the distinct last reported project statuses of the site's projects. Each is the status reported on that project's status date, not a current status.	["under_construction"]
oldest_status_as_of	oldest_status_as_of	date	no	Earliest status date (status_as_of) among the site's projects, as an ISO 8601 date.	2026-10-01
newest_status_as_of	newest_status_as_of	date	no	Latest status date (status_as_of) among the site's projects, as an ISO 8601 date.	2026-10-01
verification_posture	verification_posture	string	no	Code summarising the verification basis: a dated authoritative physical-status observation plus a reviewed location, official boundary or surrounding estate. Check the observation date and location scope. It does not mean independent, imagery-based or on-site verification.	imported_source_record
independent_imagery_verification	independent_imagery_verification	boolean	no	Whether construction has been independently verified from imagery. The schema allows only false: no data snapshot claims independent imagery verification.	false
imagery_review_outcomes_json	imagery_review_outcomes	json_array	no	JSON array of the imagery review outcome codes of the site's projects, for example not_reviewed. Outcomes are review records only and never create or change a construction claim.	["not_reviewed"]

projects.csv #

Column	JSON name	Type	Empty allowed	Description	Example
project_id	project_id	string	no	Atlas identifier (UUID) of the project, stable across data updates for the same project. Primary key.	00253157-45c0-5fde-ba45-79e7f4d56e84
project_stable_key	project_stable_key	string	no	Stable curation key of the project: the parent site key plus a project or phase slug.	curated:graven-hill-d1-data-centre-campus-bicester:eight-building-data-centre-c…
site_id	site_id	string	no	Physical site the project belongs to (sites.csv site_id).	vcc-site-405cb45c9b94c93cd89a
physical_site_stable_key	physical_site_stable_key	string	no	Stable curation key of the project's physical site or parent campus.	curated:graven-hill-d1-data-centre-campus-bicester
name	name	string	no	Project or phase name as curated from the selected source evidence.	Graven Hill D1 Data Centre Campus - eight data-centre units (Cherwell reserved …
country	country	string	no	Name of the country or territory where the project is located.	United Kingdom
country_iso_a2	country_iso_a2	string	no	ISO 3166-1 alpha-2 code of the country or territory.	GB
latitude	latitude	number	no	WGS 84 latitude, in decimal degrees, of the display anchor of the project's locator. Often the parent campus locator; not the position of the construction works.	51.8739179
longitude	longitude	number	no	WGS 84 longitude, in decimal degrees, of the display anchor of the project's locator (see latitude).	-1.1404842
geometry_json	geometry	geojson_geometry	no	GeoJSON geometry (WGS 84, longitude then latitude) used to locate the project. It is often the parent campus locator and is not a project footprint unless geometry_use_scope and geometry_precision_scope say so.	{"coordinates":[-1.1404842,51.8739179],"type":"Point"}
geometry_type	geometry_type	string	no	GeoJSON type of geometry_json: Point, Polygon or MultiPolygon.	Point
geometry_source_entity_kind	geometry_source_entity_kind	string	no	What the source geometry describes: campus, facility, building, project or address_area. A campus geometry used for a project locates the campus, not the project.	campus
geometry_derivation	geometry_derivation	string	no	How the published geometry was derived from the source geometry, for example direct_geometry or coordinates_to_point. Free-form review code, shown verbatim.	coordinate_transform
geometry_method	geometry_method	string	no	Source-specific method used to obtain the geometry. Free-form review code, shown verbatim.	cherwell_planning_register_mapserver_layer0_objectid_77943_25_03310_REM_polygon…
geometry_scope_class	geometry_scope_class	string	no	What the geometry represents, for example an official address locator point or a shared-campus reference point. Free-form review code, shown verbatim.	official_planning_application_boundary_area_centroid
geometry_authority_class	geometry_authority_class	string	no	Authority of the geometry source: official_source (a government or first-party publisher), community_source or community_mapped (for example OpenStreetMap). Community geometry is never an official boundary.	compiled_reference
geometry_use_scope	geometry_use_scope	string	no	Permitted use of the geometry: official_boundary (an official parcel or surveyed boundary), campus_locator, project_locator or reviewed_site_locator. Locators are not footprints.	project_locator
geometry_precision_scope	geometry_precision_scope	string	no	Plain-language statement of what the geometry does and does not represent.	Area centroid of the 32.3 ha application-site polygon that Cherwell District Co…
horizontal_uncertainty_metres	horizontal_uncertainty_metres	number	yes	Stated horizontal uncertainty of the locator in metres, when a bounded value is known. Empty means unknown, never zero.	187
horizontal_uncertainty_unknown_reason	horizontal_uncertainty_unknown_reason	string	yes	Why no numeric horizontal uncertainty is given. Empty when horizontal_uncertainty_metres is set.	The council publishes no positional accuracy for the application boundary, and …
geometry_evidence_id	geometry_evidence_id	string	no	evidence_id (evidence.csv) of the primary geometry source.	a0358ced-77fa-56eb-983f-ff00fe5ca7c8
last_observed_physical_status	last_observed_physical_status	string	no	Last reported project status on status_as_of: announced, permitted, a construction stage, completed, operational or another lifecycle state. This legacy column name is retained for API and CSV compatibility. Announced and permitted do not mean construction has started; completed does not mean operational.	permitted
status_as_of	status_as_of	date	no	Date (ISO 8601) on which the status was observed or reported. Existing records keep this date until a new source establishes a later observation; the Atlas update date does not refresh it.	2026-08-06
status_age_days_at_review	status_age_days_at_review	integer	no	Days from status_as_of to the dataset update date. Historical snapshots measured age against their recorded lifecycle reference date.	82
status_method	status_method	string	no	How the status was established: a project announcement, granted construction or planning consent, a physical-work report, completion or an operating-status report. Each links to its dated primary source.	authoritative_construction_permit
status_evidence_id	status_evidence_id	string	no	evidence_id (evidence.csv) of the source that reports the status.	40c6f0ad-0881-5a1e-988c-0594e3847dd0
verification_posture	verification_posture	string	no	Code summarising the verification basis of the project: a dated authoritative physical-status observation plus a reviewed location, official boundary or surrounding estate. Check status_as_of and geometry_use_scope. It does not mean independent, imagery-based or on-site verification.	authoritative_project_record_plus_scoped_location
independent_imagery_verification	independent_imagery_verification	boolean	no	Whether construction has been independently verified from imagery. The schema allows only false: no data snapshot claims independent imagery verification.	false
imagery_review_outcome	imagery_review_outcome	string	no	Imagery review outcome code, for example not_reviewed. Review outcomes are records only and never create or change a lifecycle claim.	not_reviewed
development_type	development_type	string	no	Development type (greenfield, expansion or retrofit) when the evidence establishes it; otherwise unknown.	unknown
development_type_unknown_reason	development_type_unknown_reason	string	no	Why the development type is unknown.	not established by selected evidence
operating_model	operating_model	string	no	Operating model, for example colocation, when bound to evidence; otherwise unknown. Never inferred from the operator's other facilities.	unknown
operating_model_unknown_reason	operating_model_unknown_reason	string	yes	Why the operating model is unknown. Empty when operating_model is known.	not established by selected evidence
operating_model_evidence_id	operating_model_evidence_id	string	yes	evidence_id (evidence.csv) supporting the operating model. Empty when it is unknown.	1337f6ef-1e09-5b6e-a1e0-55fbdcf95bf3
workloads_json	workloads	json_array	no	JSON array of evidence-linked workload classifications, each with workload, deployment_scope (intended, operational or unknown), method, confidence (0 to 1), as_of_date and evidence_id. These are source classifications, not proof of an operating workload.	[{"as_of_date":"2025-09-10","confidence":0.98,"deployment_scope":"intended","evidence_id":"1f776e1f-3f79-53d1-880c-e90b0fd8b958","method":"company_disclosure","workload":"mixed"}]
workload_unknown_reason	workload_unknown_reason	string	yes	Why no workload classification is published. Empty when workloads_json lists one.	not established by selected evidence
role_claims_json	role_claims	json_array	no	JSON array of evidence-linked party role claims, each with role (operator, owner, customer, tenant or user), party, relationship_scope (current, intended or unknown) and evidence_id.	[{"evidence_id":"d7ca3184-adff-581c-81b1-f4ac3362e4f4","party":"Microsoft Ireland Operations Limited","relationship_scope":"current","role":"operator"}]
power_observations_json	power_observations	json_array	no	JSON array of typed power observations, each with metric (critical_it_mw, gross_facility_mw, grid_connection_mw or generation_nameplate_mw), stage (for example planned, design or contracted), low, base and high values, unit (MW), method, confidence, as_of_date, target_date, evidence_id and notes. A planned or design value is not installed or operating capacity.	[{"as_of_date":"2026-07-19","base":39.6,"confidence":0.99,"evidence_id":"90f6acac-7fe4-57e4-b8cd-f9b6acdf6c66","high":39.6,"low":39.6,"method":"reported","metric":"critical_it_mw","notes":"Planned critical-IT capacity for Paris 2 when fully developed, using the official report's exact 39.6 MW figure rather than the location page's rounded 40 MW. This is not current load, 120 MW three-facility con…
power_unknown_reason	power_unknown_reason	string	yes	Why no typed power observation is published. Missing power is unknown, never zero.	no typed power observation selected; not estimated
annual_energy_observations_json	annual_energy_observations	json_array	no	JSON array of typed annual energy observations (metric annual_energy_mwh, unit MWh/year) with the same structure as power observations. Published only from scoped observations; never estimated from capacity.	[]
annual_energy_unknown_reason	annual_energy_unknown_reason	string	yes	Why no annual energy observation is published.	no scoped annual-energy inputs; not estimated
efficiency_observations_json	efficiency_observations	json_array	no	JSON array of typed efficiency observations (metric pue, unit ratio) with the same structure as power observations. A design PUE is not measured performance.	[{"as_of_date":"2026-07-02","base":1.4,"confidence":0.98,"evidence_id":"9590b8c5-a6cb-5c06-bd54-48063d19de70","high":1.4,"low":1.4,"method":"reported","metric":"pue","notes":"Reported project PUE retained as a design value; it is not measured, commissioned, accepted, or operating performance.","stage":"design","target_date":null,"unit":"ratio"}]
efficiency_unknown_reason	efficiency_unknown_reason	string	yes	Why no efficiency observation is published.	no scoped PUE or WUE observation
owner	owner	string	yes	Owner name(s) from evidence-linked owner role claims, separated by '; '. Empty when no owner claim is published.	Telehouse International Corporation of Europe Ltd
operator	operator	string	yes	Operator name(s) from evidence-linked operator role claims (see role_claims_json), separated by '; '. Empty when no operator claim is published.	Microsoft Ireland Operations Limited
users	users	string	yes	User name(s) from evidence-linked user role claims, separated by '; '. Empty when no user claim is published.	RIKEN
tenants	tenants	string	yes	Tenant name(s) from evidence-linked tenant role claims, separated by '; '. Empty when no tenant claim is published.	OpenAI
customers	customers	string	yes	Customer name(s) from evidence-linked customer role claims, separated by '; '. Empty when no customer claim is published.	OpenAI; Oracle
status_source_url	status_source_url	uri	no	URL of the status source; the same as the source_url of the status evidence row.	https://planningregister.cherwell.gov.uk/Document/Download?module=PLA&recordNum…
geometry_source_url	geometry_source_url	uri	no	URL of the primary geometry source; the same as the source_url of the geometry evidence row.	https://utility.arcgis.com/usrsvcs/servers/3b969cb8886849d993863e4c913c82fc/res…
project_details_json	project_details	json_array	no	Full source-linked project records, including investment, capacity, hardware, organizations, milestones, power supply and original scope. Status and location on these records can differ from a selected phase. Local source IDs resolve within record.sources; source_evidence_ids maps them to evidence.csv.	[{"identity_decision":{"decision":"unique_site","flags":["administrative_locator_not_project_geometry"],"rationale":"No matching named development in the 201-project release. Preserve DataVolt Oxagon AI data centre campus (NEOM) as an independent source record; its locality locator does not itself establish a surveyed physical site.","source_record_id":"datavolt-oxagon"},"record":{"aliases":["NEO…

evidence.csv #

Column	JSON name	Type	Empty allowed	Description	Example
evidence_id	evidence_id	string	no	Atlas identifier (UUID) of the evidence record. Primary key; referenced by status_evidence_id, geometry_evidence_id and the evidence_id of typed observations and role claims in projects.csv.	0018bbb4-353b-533f-81ca-d19336a4c0f1
roles_json	roles	json_array	no	JSON array of how the evidence is used for the linked projects: physical_status, geometry, operating_model, workload, workload_scope:<scope>, role:<role>, typed_metric:<metric>, or context:<kind> for identity and distinctness context that creates no claim on its own.	["imported:geometry","imported:record","metric:investment","metric:land_area","metric:power_capacity","milestone:announced","milestone:first_operational","power_source:grid","role:developer","role:utility"]
project_ids_json	project_ids	json_array	no	JSON array of the project_id values (projects.csv) the evidence supports.	["39dca169-c304-53a7-b2a6-15a9a914e4d1"]
kind	kind	string	no	Kind of evidence, for example company_disclosure, government_record or openstreetmap.	company_disclosure
title	title	string	no	Title of the source document, page or record as captured.	Pennsylvania Data Center Partners and PowerHouse Data Centers Launch Joint Vent…
source_url	source_url	uri	no	URL of the source. The Atlas links to sources; it does not redistribute third-party documents.	https://powerhousedata.com/news/pennsylvania-data-center-partners-and-powerhous…
publisher	publisher	string	no	Publisher or author of the source.	PowerHouse Data Centers
source_family	source_family	string	no	Atlas grouping code for sources from the same publisher channel or API. Free-form code.	powerhousedata.com
license	license	string	yes	Rights or licence code recorded for the source, for example CC-BY-4.0, ODbL-1.0 or all-rights-reserved. The source's own terms remain controlling.	source-terms-not-recorded
attribution	attribution	string	yes	Attribution text required or recommended for the source.	PowerHouse Data Centers
published_at	published_at	date_or_datetime	yes	Publication date or timestamp of the source (ISO 8601) when the source states one; empty when it does not.	2025-07-15
retrieved_at	retrieved_at	date_or_datetime	no	Date and time (ISO 8601) at which the source was retrieved or captured.	2026-10-09
content_hash	content_hash	sha256	no	SHA-256 of retained source material or a factual record projection. Read content_hash_scope and source provenance to identify exactly what was hashed; this is not always publisher-page content.	4cce16b5f9b795c626ef774ea74f6a004c8ff277db09faf71484031577a29f73
publication_date_precision	publication_date_precision	string	no	Precision of published_at: day, month, datetime or unknown. Unknown dates remain empty; month dates are not padded.	day
content_hash_scope	content_hash_scope	string	no	What content_hash covers; imported source_record_projection hashes a canonical factual record projection, never the publisher page.	source_record_projection
source_record_id	source_record_id	string	yes	Original source inventory record ID, when imported.	powerhouse-pennsylvania-digital-i-carlisle
source_local_id	source_local_id	string	yes	Original record-local source ID, when imported.	s1
source_record_sha256	source_record_sha256	string	yes	SHA-256 of the full canonical source inventory object, when imported.	0c0cb2497e4d2856da48fa35254909b5de6811fcf8e5589d7ecbcec7bdadded3

Embedded objects #

Each item of these JSON array columns is an object with the fields below. Values the source does not state are null; units follow the metric.

Object	Columns	Contract
imported_project_record	project_details_json	record policy: The record object equals the source snapshot object, including every field, unknown value, qualifier, source and original date precision. required fields: source_dataset, source_record_id, source_file, source_sha256, source_record_sha256, source_repository_commit, identity_decision, source_evidence_ids, record
role_claim	role_claims_json	allowed relationship scopes: current, intended, unknown allowed roles: builder, customer, developer, government, hardware_supplier, investor, operator, owner, power_supplier, tenant, user, utility optional fields: notes, source_record_id required fields: evidence_id, party, relationship_scope, role
typed_metric_observation	annual_energy_observations_json, efficiency_observations_json, power_observations_json	allowed methods: calculated, equipment_inference, imagery_inference, modeled, permit_inference, reported, unknown allowed stages: contracted, design, energized, forecast, installed, measured, operational, planned, requested, unknown confidence constraint: 0 <= confidence <= 1 interval constraint: 0 <= low <= base <= high required fields: as_of_date, base, confidence, evidence_id, high, low, method, metric, notes, stage, target_date, unit target date allows null: True unit by metric: annual_energy_mwh = MWh/year; critical_it_mw = MW; generation_nameplate_mw = MW; grid_connection_mw = MW; gross_facility_mw = MW; pue = ratio
workload_observation	workloads_json	allowed deployment scopes: intended, operational, unknown confidence constraint: 0 <= confidence <= 1 required fields: as_of_date, confidence, deployment_scope, evidence_id, method, workload

Derived API fields #

The JSON API, NDJSON and atlas.json add these fields after the CSV columns. Typed records turn empty values into null, numbers into JSON numbers, booleans into true/false and *_json columns into parsed JSON under the name without the suffix.

Record	Field	Description
sites	official_boundary	true when at least one project at the site uses an official boundary geometry (geometry_use_scope = official_boundary).
sites	country_slug	Lower-case ISO 3166-1 alpha-2 code, used in country page URLs.
sites	url	Absolute URL of the site's HTML page.
sites	api_url	Absolute URL of the site's JSON document (api/v1/sites/<site_id>.json).
sites	geometry_licenses	Sorted distinct license values of the evidence rows named in geometry_evidence_ids: the terms that govern the site's geometry. ODbL-1.0 marks OpenStreetMap-derived geometry (share-alike); other codes are the source's own terms. Empty when no geometry evidence row records a licence.
sites	geometry_attributions	Sorted distinct attribution values of the same geometry evidence rows, to credit when reusing the geometry.
projects	evidence_ids	Sorted evidence_id values of every evidence row whose project_ids include the project.
projects	status_source	Object describing the status evidence: evidence_id, title, publisher, kind, published_at, source_url, license and attribution.
projects	url	Absolute URL of the project's section on its site page.
projects	api_url	Absolute URL of the project's JSON document (api/v1/projects/<project_id>.json).
projects	geometry_source	The same object for the evidence row named in geometry_evidence_id (whose licence governs the project's geometry), or null when the project has no geometry evidence row.
evidence	site_ids	Sorted site_id values of the sites reached through project_ids.
evidence	url	Absolute URL of the evidence JSON document (api/v1/evidence/<evidence_id>.json). Evidence rows have no HTML page of their own, so unlike sites and projects this url is the JSON document; it equals api_url.
evidence	api_url	Absolute URL of the evidence JSON document; the same value as url.
evidence	archive_url	Wayback Machine URL for source_url at retrieved_at (https://web.archive.org/web/<timestamp>/<source_url>); the archive redirects to its nearest capture, which may not exist or may differ from the reviewed capture identified by content_hash. null when source_url is not an http(s) URL.

Coded values #

Free-form review codes such as geometry_method, geometry_derivation and geometry_scope_class are shown verbatim.

Statuses #

Code	Label	Description
lead	Lead	Unverified lead about a possible project, kept in the research queue.
candidate	Candidate	Candidate project under research. Research pipeline status only; no construction claim.
announced	Announced	A dated primary source identifies the proposed data-centre project. Construction has not been established.
proposed	Proposed	A proposed development; announcement, permission or physical work is not established.
site_control	Site control	The developer was reported to control the site, for example by purchase or lease. No physical work is claimed.
permitting	Permitting	Permits were being sought. No physical work is claimed.
permitted	Permitted	Issued consent covers the data-centre development identified in the record. The authority, decision date and approved work are recorded; construction is established separately.
site_preparation	Site preparation	A dated authoritative source reported site preparation, such as clearing, grading or enabling works, as of the status date.
clearing	Clearing	A dated source reported land clearing as of the status date.
civil_works	Civil works	A dated authoritative source reported civil works, such as earthworks, drainage, roads or utility connections, as of the status date.
foundations	Foundations	A dated authoritative source reported foundation work as of the status date.
shell	Shell	A dated authoritative source reported work on the building shell or structure as of the status date.
mep_electrical	MEP / electrical	A dated authoritative source reported mechanical, electrical and plumbing (MEP) or electrical installation work as of the status date.
under_construction	Under construction	A dated authoritative source reported that construction was under way, without a more specific stage, as of the status date.
commissioning	Commissioning	A dated authoritative source reported commissioning or testing before operation as of the status date. Not a claim that the facility is operating.
completed	Completed	A dated primary source reports construction of the named project complete. Operation is established separately.
operational	Operational	A dated primary source confirms that the facility was operating.
expansion	Expansion	A dated authoritative source reported physical expansion work at an existing facility as of the status date.
paused	Paused	Work was reported as paused.
cancelled	Cancelled	The project was reported as cancelled.
repurposed	Repurposed	The site or building was reported as repurposed for another use.
decommissioned	Decommissioned	The facility was reported as decommissioned.
demolished	Demolished	The facility was reported as demolished.
unknown	Unknown	The status is not established.
partially_operational	Partially operational	Part of the project is operating; this does not establish completion of every phase.

Status methods #

Code	Label	Description
attributed_firsthand_physical_status_report	Firsthand project statement	A named project participant's explicitly attributed physical-status statement in a reviewed news report. The publisher and original attribution remain recorded; government republication is not an inspection or certification.
authoritative_physical_status_update	Authoritative status update	A dated report from the developer, operator, contractor or government on the project's physical status.
authoritative_project_announcement	Project announcement	A dated primary source announcing the named data-centre project.
authoritative_construction_permit	Development consent	An issued government consent for the data-centre development, with its decision date and approved work recorded.
authoritative_construction_start	Authoritative construction start	A dated report from an authoritative source that construction started. Later progress is not implied.
government_record	Government record	A dated government record documenting the project's status, such as development consent, an inspection or a registry entry.
physical_observation	Physical observation	A dated, documented observation of physical work at the site.
imported_documented_status	Reported status	Status and observation date retained from the original project record; see its sources and scope.

Geometry use scopes #

Code	Label	Description
official_boundary	Official boundary	An official parcel or surveyed boundary of the project site from an official source. It is a legal or permit boundary, not a building footprint or the extent of construction.
campus_locator	Campus locator	Geometry that locates the parent campus. It is not the project's footprint and does not show where on the campus work is happening.
project_locator	Project locator	Geometry that locates the project, such as a source-published project point. It is not a footprint or a surveyed boundary.
reviewed_site_locator	Reviewed site locator	A reviewed point or shape that locates the physical site. It is not a footprint or a surveyed boundary.
host_estate_context	Host-estate context only	Geometry of the industrial estate or business park that hosts the site, kept only as locality context. It does not locate the site or project within the estate: it is not a site locator, parcel, boundary, footprint or construction extent, and its display anchor is not a site position.
locality_context	Locality reference only	The point identifies a town or locality, not the facility position.
admin2_context	County or district reference only	The point identifies a county or district, not the facility position.
admin1_context	State or region reference only	The point identifies a state or region, not the facility position.
approximate_site_locator	Approximate site reference	Approximate facility position inherited from the cited record; not a surveyed location.

Geometry authority classes #

Code	Label	Description
official_source	Official source	Published by a government authority or by a first-party source such as the developer or operator.
community_source	Community source	Taken from a community-maintained source, such as a named OpenStreetMap feature. Never treated as an official boundary.
community_mapped	Community mapped	Contributor-mapped geometry, such as an OpenStreetMap polygon, accepted only as a locator. Never treated as an official boundary.
compiled_reference	Compiled location reference	Coordinates retained with the original source record precision. Administrative points do not locate the facility.

Verification postures #

Code	Label	Description
authoritative_project_record_plus_scoped_location	Reported project and sourced location	A dated primary project record and a sourced location with its scope recorded. The status and evidence date identify what is supported.
authoritative_physical_observation_plus_reviewed_site_locator	Reported status and sourced location	A dated authoritative physical-status observation and a reviewed location. Check status_as_of for its age. This does not claim independent imagery or on-site verification.
recent_authoritative_physical_observation_plus_reviewed_site_locator	Reported status and sourced location	A dated authoritative physical-status observation and a reviewed location. Check status_as_of for its age. This does not claim independent imagery or on-site verification.
recent_authoritative_physical_observation_plus_official_boundary	Reported status and official boundary	A dated authoritative physical-status observation and an official boundary. Check status_as_of for its age. This does not claim independent imagery or on-site verification.
recent_authoritative_physical_observation_plus_host_estate_context_only	Reported status; surrounding estate only	A dated authoritative physical-status observation, with a map of the surrounding estate rather than the site's position. Check status_as_of for its age. This does not claim independent imagery or on-site verification.
imported_source_record	Sourced project record	Status, dates and location precision retained from the cited record; not independently reverified during consolidation.
mixed_review_postures	Multiple project sources	The site contains projects with different source and location reviews; consult each project.

Power metrics #

Code	Label	Unit	Description
critical_it_mw	Critical IT load	MW	Power available to IT equipment for the project scope at the stated stage. A planned or design value is not installed or operating capacity.
gross_facility_mw	Gross facility power	MW	Total facility power, including cooling and other loads, for the project scope at the stated stage.
grid_connection_mw	Grid connection	MW	Grid connection capacity for the project scope at the stated stage, for example requested, contracted or planned.
generation_nameplate_mw	Generation nameplate	MW	Nameplate capacity of on-site or dedicated generation at the stated stage.
annual_energy_mwh	Annual energy	MWh/year	Annual energy for the project scope. Published only from scoped observations; never estimated from capacity.
pue	PUE	ratio	Power usage effectiveness (total facility energy divided by IT energy). A design value is not measured performance.

Power stages #

Code	Label	Description
requested	Requested	Capacity requested from a utility or authority; not granted or built.
contracted	Contracted	Capacity covered by an agreement such as a grid or power-purchase contract; not necessarily installed.
design	Design	Design capacity or value; not installed, energized or operating.
planned	Planned	Planned capacity for the project scope; not installed, energized or operating.
installed	Installed	Reported as installed; not necessarily energized or in use.
energized	Energized	Reported as energized.
operational	Operational	Reported as in operation.
measured	Measured	A measured value.
forecast	Forecast	A forecast value.
unknown	Unknown stage	The stage of the reported value is not established.

Estimate methods #

Code	Label	Description
reported	Reported	The value is reported by the source.
calculated	Calculated	Calculated from reported inputs.
permit_inference	Permit inference	Inferred from permit documents.
equipment_inference	Equipment inference	Inferred from equipment records, such as generator or transformer orders.
imagery_inference	Imagery inference	Inferred from imagery.
modeled	Modeled	Produced by a model.
unknown	Unknown method	The method is not established.

Evidence kinds #

Code	Label	Description
government_environmental_document	Environmental assessment document	An environmental assessment or supporting document published by a government authority. Its project, location and approval scope are stated separately.
operator_website	Operator website	A facility description or other information published on the operator's website. Publication and observation dates are recorded separately.
certification_registry	Certification registry	A facility entry published by the certifying organization. Certification scope and dates do not by themselves establish an opening date or full-campus operation.
government_notice	Government notice	A notice published by a government body. A lease award or announcement is distinct from permission to build and from achieved physical work.
map	Map feature	A feature from a map provider. The project record states the identity bridge, locator scope and provider terms; a marker is not a surveyed boundary.
government_record	Government record	A record published by a government body, such as a permit, planning, cadastral or registry record.
company_disclosure	Company disclosure	A publication by the developer, operator, contractor or another company involved, such as a press release, project page or report.
utility_record	Utility record	A record or announcement from a utility.
equipment_order	Equipment order	An equipment order or procurement record.
satellite_imagery	Satellite imagery	A satellite image record.
openstreetmap	OpenStreetMap	An OpenStreetMap object (© OpenStreetMap contributors, ODbL 1.0).
third_party_dataset	Third-party dataset	A record from a third-party dataset.
news	News	A news report.
other	Other	Another kind of source, such as a technical specification used for coordinate handling.
commercial_directory_record	Commercial directory record	An entry in a commercial data-centre directory.
company_facility_page	Company facility page	A facility page published by the operator or developer.
company_facility_specification	Company facility specification	A facility specification published by the operator or developer.
government_address_register	Government address register	An entry in an official address register.
government_cadastral_api	Government cadastral API	A record from an official cadastral (property) API.
government_cadastral_open_data	Government cadastral open data	A record from official open cadastral data.
government_coordinate_transformation	Government coordinate transformation	A result from an official coordinate transformation service.
government_event_project_locator	Government event project locator	A project location published with an official government event notice.
government_municipal_project_map	Government municipal project map	A municipal project map or project page.
government_permit	Government permit	A permit decision published by a government authority.
government_planning_record	Government planning record	An official planning document or record.
government_registry	Government registry	An entry in an official registry or facilities list.
government_statistical_boundary	Government statistical boundary	An official statistical-area boundary. It is not a site or parcel boundary.
open_dataset	Open dataset	A record from an open dataset, such as OpenStreetMap edit history.
open_map	Open map	An object from an open map such as OpenStreetMap.
open_map_geometry	Open map geometry	Geometry from an open map such as OpenStreetMap.
open_map_record	Open map record	A full record from an open map, such as an OpenStreetMap way with its nodes.
regulatory_filing	Regulatory filing	A regulatory filing, such as a securities filing.
analyst_report	Analyst report	Analysis published by a research organization.
court_record	Court record	A court filing or decision.
trade_press	Trade publication	Industry news reporting.
utility_disclosure	Utility disclosure	Information published by an electricity or infrastructure utility.

Evidence roles #

Code	Label	Description
announcement	Project announcement	Supports the announcement of the named data-centre project.
permit	Development consent	Supports issued consent for the named data-centre development and identifies the approved work.
physical_status	Physical status	Source of the project's last observed physical status.
geometry	Geometry	Source of the published locator or boundary geometry.
context:identity	Site and project identity	Connects the named project, campus or facility to the record. Does not establish construction status.
context:power_readiness	Grid connection context	Evidence about supporting power infrastructure. Does not establish data-centre construction status or energized capacity.
context:geometry_identity	Geometry identity context	Context used to tie the geometry to the named site. Not a status source.
context:site_distinctness	Site distinctness context	Context used to establish that the site is distinct from the other sites in the Atlas.
context:source_location_identity	Source location context	Context tying the source's stated location to the site.
context:campus_address_identity	Campus address context	Context tying a published address to the campus.
context:project_context	Project context	Background context for the project. Creates no claim.
context:project_and_campus_identity	Project and campus identity context	Context tying the project to its parent campus.
operating_model	Operating model	Source of the published operating model.
workload	Workload	Source of a published workload classification.
workload_scope:intended	Intended workload	Supports a workload classification scoped as intended, not operational.
workload_scope:operational	Operational workload	Supports a workload classification scoped as operational.
workload_scope:unknown	Workload scope unknown	Supports a workload classification whose deployment scope is not established.
role:operator	Operator claim	Supports an operator role claim.
role:owner	Owner claim	Supports an owner role claim.
role:customer	Customer claim	Supports a customer role claim.
role:tenant	Tenant claim	Supports a tenant role claim.
role:user	User claim	Supports a user role claim.
typed_metric:critical_it_mw	Critical IT load observation	Supports a typed critical IT load observation.
typed_metric:gross_facility_mw	Gross facility power observation	Supports a typed gross facility power observation.
typed_metric:grid_connection_mw	Grid connection observation	Supports a typed grid connection observation.
typed_metric:generation_nameplate_mw	Generation nameplate observation	Supports a typed generation nameplate observation.
typed_metric:annual_energy_mwh	Annual energy observation	Supports a typed annual energy observation.
typed_metric:pue	PUE observation	Supports a typed power usage effectiveness observation.
context:multi_site_program	Context: Multi Site Program	Source for the context multi site program claim, retaining its original scope and date.
imported:geometry	Imported: Geometry	Source for the imported geometry claim, retaining its original scope and date.
imported:record	Imported: Record	Source for the imported record claim, retaining its original scope and date.
imported:status	Imported: Status	Source for the imported status claim, retaining its original scope and date.
metric:accelerators	Metric: Accelerators	Source for the metric accelerators claim, retaining its original scope and date.
metric:buildings	Metric: Buildings	Source for the metric buildings claim, retaining its original scope and date.
metric:floor_area	Metric: Floor Area	Source for the metric floor area claim, retaining its original scope and date.
metric:investment	Metric: Investment	Source for the metric investment claim, retaining its original scope and date.
metric:jobs_construction	Metric: Jobs Construction	Source for the metric jobs construction claim, retaining its original scope and date.
metric:jobs_permanent	Metric: Jobs Permanent	Source for the metric jobs permanent claim, retaining its original scope and date.
metric:land_area	Metric: Land Area	Source for the metric land area claim, retaining its original scope and date.
metric:power_capacity	Metric: Power Capacity	Source for the metric power capacity claim, retaining its original scope and date.
milestone:announced	Milestone: Announced	Source for the milestone announced claim, retaining its original scope and date.
milestone:cancelled	Milestone: Cancelled	Source for the milestone cancelled claim, retaining its original scope and date.
milestone:construction_started	Milestone: Construction Started	Source for the milestone construction started claim, retaining its original scope and date.
milestone:expansion_announced	Milestone: Expansion Announced	Source for the milestone expansion announced claim, retaining its original scope and date.
milestone:first_operational	Milestone: First Operational	Source for the milestone first operational claim, retaining its original scope and date.
milestone:fully_operational	Milestone: Fully Operational	Source for the milestone fully operational claim, retaining its original scope and date.
milestone:other	Milestone: Other	Source for the milestone other claim, retaining its original scope and date.
milestone:paused	Milestone: Paused	Source for the milestone paused claim, retaining its original scope and date.
milestone:permit_approved	Milestone: Permit Approved	Source for the milestone permit approved claim, retaining its original scope and date.
milestone:site_acquired	Milestone: Site Acquired	Source for the milestone site acquired claim, retaining its original scope and date.
milestone:zoning_approved	Milestone: Zoning Approved	Source for the milestone zoning approved claim, retaining its original scope and date.
power_source:battery_storage	Power Source: Battery Storage	Source for the power source battery storage claim, retaining its original scope and date.
power_source:diesel_backup	Power Source: Diesel Backup	Source for the power source diesel backup claim, retaining its original scope and date.
power_source:fuel_cell	Power Source: Fuel Cell	Source for the power source fuel cell claim, retaining its original scope and date.
power_source:geothermal	Power Source: Geothermal	Source for the power source geothermal claim, retaining its original scope and date.
power_source:grid	Power Source: Grid	Source for the power source grid claim, retaining its original scope and date.
power_source:hydro	Power Source: Hydro	Source for the power source hydro claim, retaining its original scope and date.
power_source:natural_gas_onsite	Power Source: Natural Gas Onsite	Source for the power source natural gas onsite claim, retaining its original scope and date.
power_source:nuclear	Power Source: Nuclear	Source for the power source nuclear claim, retaining its original scope and date.
power_source:other	Power Source: Other	Source for the power source other claim, retaining its original scope and date.
power_source:solar	Power Source: Solar	Source for the power source solar claim, retaining its original scope and date.
power_source:wind	Power Source: Wind	Source for the power source wind claim, retaining its original scope and date.
role:builder	Role: Builder	Source for the role builder claim, retaining its original scope and date.
role:developer	Role: Developer	Source for the role developer claim, retaining its original scope and date.
role:government	Role: Government	Source for the role government claim, retaining its original scope and date.
role:hardware_supplier	Role: Hardware Supplier	Source for the role hardware supplier claim, retaining its original scope and date.
role:investor	Role: Investor	Source for the role investor claim, retaining its original scope and date.
role:power_supplier	Role: Power Supplier	Source for the role power supplier claim, retaining its original scope and date.
role:utility	Role: Utility	Source for the role utility claim, retaining its original scope and date.

Relationship scopes #

Code	Label	Description
current	Current	The relationship is reported as current.
intended	Intended	The relationship is reported as planned or intended; it is not necessarily in effect.
unknown	Unknown scope	Whether the relationship is current or intended is not established.

Workload deployment scopes #

Code	Label	Description
intended	Intended	The workload is reported as intended or planned. Not proof that it runs at the site.
operational	Operational	The workload is reported as running at the site.
unknown	Unknown scope	Whether the workload is intended or operational is not established.

Party roles #

Code	Label	Description
operator	Operator	The party that operates, or is to operate, the facility.
owner	Owner	The party that owns, or is to own, the facility.
customer	Customer	A customer of the facility or project.
tenant	Tenant	A tenant of the facility.
user	User	A user of the facility's capacity.
builder	Builder	Source for the builder claim, retaining its original scope and date.
developer	Developer	Source for the developer claim, retaining its original scope and date.
government	Government	Source for the government claim, retaining its original scope and date.
hardware_supplier	Hardware Supplier	Source for the hardware supplier claim, retaining its original scope and date.
investor	Investor	Source for the investor claim, retaining its original scope and date.
power_supplier	Power Supplier	Source for the power supplier claim, retaining its original scope and date.
utility	Utility	Source for the utility claim, retaining its original scope and date.

Workloads #

Code	Label	Description
ai_specialized_unspecified	AI (unspecified)	Reported as AI-specialized without a split between training and inference.
ai_training	AI training	AI model training.
ai_inference	AI inference	AI inference.
hpc	HPC	High-performance computing.
general_cloud	General cloud	General-purpose cloud services.
enterprise_it	Enterprise IT	Enterprise IT workloads.
content_delivery	Content delivery	Content delivery.
crypto_mining	Crypto mining	Cryptocurrency mining.
mixed	Mixed	A mix of workloads.
unknown	Unknown workload	The workload is not established.

Workload methods #

Code	Label	Description
company_disclosure	Company disclosure	Classification taken from a company disclosure.
government_record	Government record	Classification taken from a government record.

Operating models #

Code	Label	Description
hyperscaler	Hyperscaler	Built or used by a hyperscale cloud provider.
hyperscale_self_build	Hyperscale self-build	Built by the hyperscale provider that will use it.
hyperscale_lease	Hyperscale lease	Built by a developer for lease to a hyperscale provider.
colocation	Colocation	Space, power and cooling offered to customers.
wholesale_colocation	Wholesale colocation	Colocation sold in large blocks to few customers.
retail_colocation	Retail colocation	Colocation sold in smaller units to many customers.
neocloud	Neocloud	Operated by a specialized GPU or AI cloud provider.
enterprise_private	Enterprise private	Built for a single enterprise's own use.
government_research	Government research	Government or research facility.
sovereign_research	Sovereign research	National or sovereign research computing facility.
edge	Edge	Edge data centre.
telecom_edge	Telecom edge	Telecom edge facility.
unknown	Unknown	The operating model is not established by the selected evidence.

Development types #

Code	Label	Description
greenfield	Greenfield	New development on an undeveloped site.
expansion	Expansion	Expansion of an existing facility or campus.
retrofit	Retrofit	Conversion or refit of an existing building.
unknown	Unknown	The selected evidence does not establish the development type.

Geometry source entity kinds #

Code	Label	Description
campus	Campus	The source geometry describes the parent campus.
facility	Facility	The source geometry describes a facility on the campus.
building	Building	The source geometry describes a building.
project	Project	The source geometry describes the project itself.
address_area	Address area	The source geometry describes an address or statistical area, not the site itself.
host_estate	Host estate	The source geometry describes the estate or industrial park that hosts the site, not the site itself.

Imagery review outcomes #

Code	Label	Description
not_reviewed	Not reviewed against imagery	No imagery review is recorded for this project. Its status rests only on the dated authoritative source.
not_reviewed_for_core_preview	Not reviewed against imagery	No imagery review is recorded for this project. Its status rests only on the dated authoritative source.
first_party_contractor_drone_imagery_present_not_independently_verified	Publisher or contractor drone imagery, not independently verified	The publisher or its contractor has published drone imagery of the works. The Atlas did not verify it independently and does not redistribute it. No construction, completion or progress claim is made from imagery.
tracked_blind_clear_locally_unsealed_identity_no_construction_claim	Blind imagery review: clear visible change, identity link not public	A blind satellite-image comparison recorded clear visible change, but the link between the reviewed images and this project exists only in unpublished local files. Recorded for follow-up only. No construction, completion or progress claim is made from imagery.
tracked_blind_ambiguous_locally_unsealed_identity_no_construction_claim	Blind imagery review: ambiguous, identity link not public	A blind satellite-image comparison was ambiguous (for example partly obscured), and the link between the reviewed images and this project exists only in unpublished local files. No construction, completion or progress claim is made from imagery.
tracked_blind_reject_locally_unsealed_identity_no_construction_claim	Blind imagery review: rejected, identity link not public	A blind satellite-image review rejected the imagery as support, and the link between the reviewed images and this project exists only in unpublished local files. No construction, completion or progress claim is made from imagery.
tracked_identity_bound_reject_with_unadjudicated_later_conflict_no_construction_claim	Imagery review: rejected; a later conflicting review is not adjudicated	An imagery review bound to this project rejected the imagery as support. A later review disagrees and has not been adjudicated. No construction, completion or progress claim is made from imagery.
tracked_identity_bound_uncertain_unsuperseded_no_construction_claim	Imagery review: uncertain	An imagery review bound to this project was uncertain (image quality or ambiguous change), and no later review supersedes it. No construction, completion or progress claim is made from imagery.
tracked_identity_bound_uncertain_with_unadjudicated_later_clear_conflict_no_construction_claim	Imagery review: uncertain; a later review saw clear change, not adjudicated	An imagery review bound to this project was uncertain. A later review recorded clear visible change but has not been adjudicated. No construction, completion or progress claim is made from imagery.
tracked_identity_bound_uncertain_with_unadjudicated_later_stricter_review_no_construction_claim	Imagery review: uncertain; a later stricter review is not adjudicated	An imagery review bound to this project was uncertain. A later, stricter review exists but has not been adjudicated. No construction, completion or progress claim is made from imagery.
tracked_identity_bound_visible_change_followup_only_no_construction_claim	Imagery review: visible change, follow-up only	An imagery review bound to this project saw visible change. It is kept for follow-up only and is not used as evidence of construction. No construction, completion or progress claim is made from imagery.