1001 Smart Cities

Permanent project revision

Signalen: Open-Source Public-Space Reporting Platform

Revision 2026-08-27-claims-and-sources · effective 2026-07-20

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

unreviewed

Created the first structured Evidence Passport with 11 claims and 6 source dossiers.

sha256:006b99387151cfb306b6b0b8793252c7b200c369afdacc068ecea341421929cc
All revisions → Current entity page →

Change set

  • add /evidencePassport — Added claim-level evidence mapping and source dossiers.
  • add /revisionHistory — Established a permanent, hash-addressed baseline revision.
11
of 11 claims mapped
6
source dossiers
1
publication dates recorded
0
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-0b1c23bf076e3ed4 quantitative
The system went live in 2018 as Signalen Informatievoorziening Amsterdam, the same year the city put a 24/7 Action Service Centre behind it
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The audit office records that in 2018 the Action Service Centre began monitoring, handling and reporting back on public-space reports 24/7, and that the new reporting system Signalen Informatievoorziening Amsterdam (SIA) went live in the same year.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Rekenkamer Amsterdam (independent municipal audit office)
Claim 2 clm-fdd1165f1d9937e3 descriptive
by web, app, phone, social media, e-mail or at a counter
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The audit report lists the reporting channels and states that Amsterdam offers every channel that the other 48 municipalities in its benchmark offer between them.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Rekenkamer Amsterdam (independent municipal audit office)
Claim 3 clm-48190093f8f9e9b1 quantitative
Since July 2022 a classifier trained on 300,000 past reports (TF-IDF plus logistic regression, macro-weighted F1 0.88) reads the free text and routes it to a department
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The national algorithm register gives the start date as 2022-07 and describes TF-IDF word weighting followed by logistic regression, trained initially on 300,000 earlier reports, with a macro-weighted F1 score of 0.88.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Algoritmes.overheid.nl (Dutch national algorithm register, authority)
Claim 4 clm-9db979c1d7882382 quantitative
anything it places with less than 40% certainty goes to that centre for a person to categorise
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The register states that all reports assigned to a category with less than 40% certainty are forwarded to the Actie Service Centrum, where a human assessment follows.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Algoritmes.overheid.nl (Dutch national algorithm register, authority)
Claim 5 clm-d5b255488fe53ec7 descriptive
The software is open source and other Dutch municipalities run it too
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The collaboration's site describes Signalen as open-source software of, for and by Dutch municipalities; the national register carries near-identical algorithm descriptions from Meierijstad, Blaricum, Almere, Hilversum and Eemnes, each marked in use.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Signalen.org — the municipal collaboration behind the platform
  2. Algoritmes.overheid.nl (Dutch national algorithm register, authority)
Claim 6 clm-3e4ed0b966fa12bf quantitative
the city records that W2V, CNN+LSTM and BERT were tried and performed worse
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The register states that other methods (W2V, CNN+LSTM, BERT) were also tried but proved to perform less well.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Algoritmes.overheid.nl (Dutch national algorithm register, authority)
Claim 7 clm-67e875dbb4198a3d quantitative
the municipalities running it serve 3 million residents and process more than 800,000 reports a year with 2,800 officials
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The collaboration's own site states that with Signalen they serve 3 million residents and process more than 800,000 reports a year with 2,800 officials.
Caveat
A self-reported total for the collaboration as a whole, not for Amsterdam alone.

Sources carrying this claim

  1. Signalen.org — the municipal collaboration behind the platform
Claim 8 clm-5ad1a78e070a455e quantitative
in June 2021 the municipal audit office found that Amsterdam had received over 385,000 reports in 2020, around 88% more than in 2018
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The audit report of 2 June 2021 states that Amsterdam received more than 385,000 public-space reports in 2020, a rise of some 88% on 2018.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Rekenkamer Amsterdam (independent municipal audit office)
Claim 9 clm-af91a78fcd016a62 quantitative
judged the handling partly effective, and reported 52% of complainants satisfied against an internal target of 70%
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same report judges the handling of public-space reports partly effective and states that 52% of reporters are satisfied while 70% is the internal aim.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Rekenkamer Amsterdam (independent municipal audit office)
Claim 10 clm-e70d8ade06d274d2 descriptive
a considerable share of reports — urgent ones included — were not handled within the promised time
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The audit report states that a considerable share of the (urgent) reports is not handled within the promised deadline.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Rekenkamer Amsterdam (independent municipal audit office)
Claim 11 clm-b6ca3e9548d512e7 descriptive
that reports marked handled were not always resolved in a result-oriented way, and that recurring problems such as rubbish beside the containers were tackled structurally only to a limited extent
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same summary states that reports with the status 'handled' are not always resolved in a result-oriented way and that the executive succeeds only to a limited extent in structurally solving recurring problems, giving waste beside the container as its example.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Rekenkamer Amsterdam (independent municipal audit office)

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-claims-and-sources effective 2026-07-20 · created 2026-08-27

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

Erratum on this revision's envelope. The snapshot, its hash and its permanent link are untouched.

  • createdAt previously read 2026-08-28T12:00:00Z. The batching script that produced this revision advanced createdAt into the future to satisfy the strictly-increasing order the validator requires per entity. The value never recorded a real event; the corrected value is the moment the revision provably existed in the repository. Corrected to 2026-08-27T01:42:12Z on 2026-08-27; evidence: first appears in commit a148f4f45c, committed 2026-08-27T01:42:12Z.
sha256:006b99387151cfb306b6b0b8793252c7b200c369afdacc068ecea341421929cc
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
11
of 11 claims mapped
6
source dossiers
1
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
City of Amsterdam
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

6 source dossiers

Algoritmes.overheid.nl (Dutch national algorithm register, authority) algoritmes.overheid.nl · 4 linked claims

Open original source ↗

Stable source ID
src-6c21675d7275cd09
Publisher
Name not classified · algoritmes.overheid.nl
Type / language
web-page · language not classified
Published
Not recorded
Updated
2026-04-21
Source last checked
No source-level check date
Record last verified
2026-07-20
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official transparency entry, last amended 21 April 2026: start date 2022-07, TF-IDF plus logistic regression, macro-weighted F1 0.88, 300,000 historical reports used for initial training with regular retraining on manual corrections, W2V/CNN+LSTM/BERT tried and found worse, and everything below 40% certainty routed to the Action Service Centre.

Descriptive only — not page/paragraph exact
Claims linked
VNG — Vereniging van Nederlandse Gemeenten vng.nl · background

Open original source ↗

Stable source ID
src-2e4c7d76c5cc6ed1
Publisher
Name not classified · vng.nl
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-20
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Project page for Signalen at the association of Dutch municipalities.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
GitHub — Amsterdam/signals (source repository published by the City of Amsterdam) github.com · background

Open original source ↗

Stable source ID
src-d2a10ba1f48299a6
Publisher
Name not classified · github.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
2026-07-20
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Source repository for the Signalen platform, published by the City of Amsterdam.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Rekenkamer Amsterdam (independent municipal audit office) publicaties.rekenkamer.amsterdam.nl · 6 linked claims

Open original source ↗

Stable source ID
src-942a289317663249
Publisher
Name not classified · publicaties.rekenkamer.amsterdam.nl
Type / language
web-page · language not classified
Published
2021-06-02
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-20
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Governance report of 2 June 2021: over 385,000 reports in 2020, some 88% more than 2018; handling judged partly effective; a considerable share of urgent reports missed the promised deadline; reports marked handled were not always resolved in a result-oriented way; 52% of complainants satisfied against an internal target of 70%. It also records that the reporting system went live in 2018 alongside a 24/7 Action Service Centre, and that Amsterdam offers every reporting channel the other 48 benchmark municipalities offer between them.

Descriptive only — not page/paragraph exact
Claims linked
City of Amsterdam (authority) amsterdam.nl · background

Open original source ↗

Stable source ID
src-659c8e05174dc662
Publisher
Name not classified · amsterdam.nl
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-20
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official citizen-facing reporting page.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Signalen.org — the municipal collaboration behind the platform signalen.org · 2 linked claims

Open original source ↗

Stable source ID
src-014c55898d5d8727
Publisher
Name not classified · signalen.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-20
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Site of the inter-municipal Signalen collaboration: open-source software of, for and by Dutch municipalities, together serving 3 million residents and processing more than 800,000 reports a year with 2,800 officials.

Descriptive only — not page/paragraph exact
Claims linked
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.