Permanent project revision

Helsinki 3D+ Open City Model

Revision 2026-08-27-source-dating · effective 2026-07-24

Current revision. This is the snapshot used by the live entity page.

unreviewed

Every source on this entry now carries a date key: a publication date where the publisher states one, otherwise an explicit null with the reason on the record.

sha256:8ec9bd6ded33dafa0d22c578a20f628bf2f2ba443cf6bfe3b38c153c8be8ee8f

All revisions → Current entity page →

Change set

replace /snapshot/projectFingerprint — Updated projectFingerprint to the current sourced project record.
replace /snapshot/sources — Updated sources to the current sourced project record.

5: of 5 claims mapped
4: source dossiers
2: publication dates recorded
1: archives linked
0: exact locators
0: content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-3695404c914a5a06 quantitative

Helsinki 3D+ is the city's open 3D model of every building and the ground surface, combining a semantic CityGML information model with a high-resolution reality mesh, released as free open data in 2016

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The city page describes both model types and their open-data formats; the technology partner dates the completed reality mesh and CityGML model to November 2016; the trade report of February 2017 describes both as already live and free.
Caveat: No claim-specific caveat recorded

Claim 2 clm-0f0378ba7cef6a15 descriptive

Every building is a semantic CityGML object carrying its own database identifiers, so other data streams can be joined to it, and the CityGML files are downloadable in map sheets of four square kilometres

Published field: snippet · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The city page states that all buildings are semantic CityGML objects, that each has its own identifiers allowing the combination of data streams, and that the CityGML files are divided into map sheets of four square kilometres.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

City of Helsinki (authority)

Claim 3 clm-81097e0b957da8f1 quantitative

The Energy and Climate Atlas, built on the model, shows an indicative energy-consumption estimate for nearly every building in Helsinki and calculates how much solar radiation each roof and wall surface in the city receives, annually and monthly — nearly a million surfaces in all

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The city page describes the atlas as a free browser service based on the 3D city models, gives the indicative consumption estimate for nearly every building, and states that solar calculations cover all roof and wall surfaces in Helsinki, nearly a million of them, annually and monthly.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

City of Helsinki (authority)

Claim 4 clm-8852a428f78694b5 descriptive

Aalto University researchers cite it as their example of a city model turned into a service a resident can use, letting anyone check the solar potential of their own home

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The university's account quotes a researcher giving the Energy and Climate Atlas as the example of citizens benefiting from services built on city models, by checking the solar power production potential of their home.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

Aalto University (independent)

Claim 5 clm-d1ca04d3339f6d0c descriptive

Making every building a semantic object with its own database keys is what let the city hang energy, heating and solar data on it afterwards

Published field: lesson · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The city page ties the per-building identifiers directly to the ability to combine data streams, and describes the atlas built on that base.
Caveat: No claim-specific caveat recorded

Sources carrying this claim

City of Helsinki (authority)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-27-source-dating effective 2026-07-24 · created 2026-08-27

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:8ec9bd6ded33dafa0d22c578a20f628bf2f2ba443cf6bfe3b38c153c8be8ee8f

Revision history → Permanent version link → Machine-readable record → Evidence Constitution →

5: of 5 claims mapped
4: source dossiers
2: publication dates recorded
1: archives linked
0: exact locators
0: content captures hashed

Governance facts carried by the record

Operator: City of Helsinki
Actor types: city-government
Funding model: public
Funding description: Not recorded
Cost: Not recorded
Ownership: Not recorded
Decision rights: Not recorded
Exit conditions: Not recorded

4 source dossiers

City of Helsinki (authority) hel.fi · 4 linked claims

Open original source ↗

Stable source ID: src-3ad6b571e8bee43c
Publisher: Name not classified · hel.fi
Type / language: web-page · language not classified
Published: 2018-04-15
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-24
Dossier created: 2026-08-27
Retrieved copy: No local capture recorded
Archive: Open archived copy ↗ · 2026-07-29
Content hash: No captured content hash
Locator: Open the recorded source note
Official page: two model types, open-data formats (OBJ/CityGML/3MX), kartta.hel.fi/3d download portal, continuous updates.
Descriptive only — not page/paragraph exact
Claims linked: clm-3695404c914a5a06
clm-0f0378ba7cef6a15
clm-81097e0b957da8f1
clm-d1ca04d3339f6d0c

Bentley Systems (technology partner) bentley.com · 1 linked claim

Open original source ↗

Stable source ID: src-f47bc21acd557a1c
Publisher: Name not classified · bentley.com
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-24
Dossier created: 2026-08-27
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Vendor case study: reality-mesh + CityGML model completed November 2016, €1M investment, ContextCapture/OpenCities Map tech stack. The publisher declares June 2022; the day it stamps is the first of the month, which this atlas does not treat as a publication day, so the date is recorded to the month.
Descriptive only — not page/paragraph exact
Claims linked: clm-3695404c914a5a06

AEC Business (independent trade press) aec-business.com · 1 linked claim

Open original source ↗

Stable source ID: src-5b1e1245e9577b05
Publisher: Name not classified · aec-business.com
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-24
Dossier created: 2026-08-27
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Independent account, dated Feb 2017, of the already-live models and free open-data commitment. No publication date is recorded: the page did not answer when this entry was checked.
Descriptive only — not page/paragraph exact
Claims linked: clm-3695404c914a5a06

Aalto University (independent) aalto.fi · 1 linked claim

Open original source ↗

Stable source ID: src-9fcc068e07847764
Publisher: Name not classified · aalto.fi
Type / language: web-page · language not classified
Published: 2021-04-07
Updated: 2021-07-01
Source last checked: No source-level check date
Record last verified: 2026-07-24
Dossier created: 2026-08-27
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Confirms the Energy and Climate Atlas solar-potential use (80,000 buildings) and a service-visualisation tool applied to Kalasatama.
Descriptive only — not page/paragraph exact
Claims linked: clm-8852a428f78694b5

Known limits of this passport

Publisher names and source languages have not yet been classified; domains are recorded without guessing.
Existing source notes are descriptive locators, not page- or paragraph-exact citations.
A missing archive, publication date or content hash is shown as null rather than inferred.
The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.