1001 Smart Cities

Permanent project revision

GEPTIS: Bengaluru's Geospatial Property Tax Map

Revision 2026-08-26-p1-quality-uplift · effective 2026-08-26

Superseded. A later revision exists: 2026-08-27-correction-run →

unreviewed

Created the first structured Evidence Passport with 7 claims and 5 source dossiers.

sha256:146e160dcb05b5c53793e7cc89af334054a3c2b94db68d44eec9f81902d5f147
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.
7
of 7 claims mapped
5
source dossiers
4
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-b1685fbab24a8b28 quantitative
GEPTIS, opened in December 2016 with India's National Remote Sensing Centre, colour-codes every assessed property by payment status
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The December 2016 report covers the launch of the online property tax monitoring system and its partner institution; the corporation's own departmental page describes the colour-coding by payment status.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. The News Minute — BBMP introduces online property tax monitoring system for Bengaluru
  2. BBMP / Greater Bengaluru Authority — GEPTIS (IT Department)
Claim 2 clm-aca2ab9d21207f3a quantitative
has grown from 600,000 property IDs over 225 sq km to more than 2 million records over 800 sq km
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The launch report gives the starting scope of the system and the corporation's own page the current extent.
Caveat
The growth figures come from the corporation's own account of its system; no independent count was found for this entry.

Sources carrying this claim

  1. BBMP / Greater Bengaluru Authority — GEPTIS (IT Department)
  2. The News Minute — BBMP introduces online property tax monitoring system for Bengaluru
Claim 3 clm-39919d4da669417b quantitative
in 2021 local reporting noted the corporation had never met a property tax target, and a state finance commission review found fewer than half the city's properties assessed
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The April 2021 report on the corporation's plans to fix its property tax gaps carries both findings: the record against targets and the finance commission's assessment coverage figure.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Citizen Matters — BBMP's plan to fix property tax gaps and loopholes
Claim 4 clm-78ffb15d62616ca5 quantitative
two audit rounds combining GPS door-to-door surveys with drone imagery flagged 688 crore rupees of under-declared tax across 23,600 properties by February 2026
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The February 2026 reports carry the cumulative figure across both rounds and the method - GPS-based door-to-door survey work with drone imagery - with the second round reported separately as 318 crore rupees across 13,600 properties.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. News9 — Bengaluru civic body detects 688 crore rupees of property tax evasion using drones and GPS
  2. Deccan Herald — 318 crore rupees of tax evasion flagged at 13,600 properties in a second audit round
Claim 5 clm-529e4c3a7cea75ce quantitative
688 crore rupees of under-declared property tax flagged across 23,600 properties in two audit rounds to February 2026 — amounts detected, not amounts recovered
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Both February 2026 reports describe the sums as detected or flagged evasion from the audit rounds. Neither reports collection against them, which is why the entry says so in the same sentence.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. News9 — Bengaluru civic body detects 688 crore rupees of property tax evasion using drones and GPS
  2. Deccan Herald — 318 crore rupees of tax evasion flagged at 13,600 properties in a second audit round
Claim 6 clm-1df23797d44a499f descriptive
years later the corporation had still never met a property tax target while a state finance commission review found fewer than half the city's properties assessed
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 2021 report carries both, four and a half years after the map opened.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Citizen Matters — BBMP's plan to fix property tax gaps and loopholes
Claim 7 clm-b6b6609c2faa169f descriptive
The money only started moving when the map was paired with something that knocks on doors - GPS door-to-door surveys and drone imagery - and even then what the audits produce is tax flagged, not tax collected
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The sequence is in the sources: the map from 2016, the unmet targets and the assessment gap still there in 2021, and the audits that produced a number only once survey teams and drones were added. The reports describe the result as detected evasion.
Caveat
The entry's own reading of the sequence across three sources; none of them draws the conclusion.

Sources carrying this claim

  1. News9 — Bengaluru civic body detects 688 crore rupees of property tax evasion using drones and GPS
  2. Deccan Herald — 318 crore rupees of tax evasion flagged at 13,600 properties in a second audit round
  3. Citizen Matters — BBMP's plan to fix property tax gaps and loopholes

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 2026-08-26-p1-quality-uplift effective 2026-08-26 · created 2026-08-26

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 2026-08-26T16:28:00Z. 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 2026-08-26T14:11:55Z on 2026-08-27; evidence: first appears in commit 5fac751ec9, committed 2026-08-26T14:11:55Z.
sha256:146e160dcb05b5c53793e7cc89af334054a3c2b94db68d44eec9f81902d5f147
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
7
of 7 claims mapped
5
source dossiers
4
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Greater Bengaluru Authority and the five city corporations (BBMP until September 2025)
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

5 source dossiers

The News Minute — BBMP introduces online property tax monitoring system for Bengaluru thenewsminute.com · 2 linked claims

Open original source ↗

Stable source ID
src-329dd1455c090111
Publisher
Name not classified · thenewsminute.com
Type / language
web-page · language not classified
Published
2016-12-28
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Dated 28 Dec 2016. Fixes the launch: inaugurated 27 December 2016, built with ISRO's National Remote Sensing Centre; colour-coded default map; 1.89 million properties then on record.

Descriptive only — not page/paragraph exact
Claims linked
BBMP / Greater Bengaluru Authority — GEPTIS (IT Department) site.bbmp.gov.in · 2 linked claims

Open original source ↗

Stable source ID
src-faa13020b7b19f47
Publisher
Name not classified · site.bbmp.gov.in
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The corporation's own page for the system. A standing departmental page with no publication date.

Descriptive only — not page/paragraph exact
Claims linked
Citizen Matters — BBMP's plan to fix property tax gaps and loopholes citizenmatters.in · 3 linked claims

Open original source ↗

Stable source ID
src-7c2f469d163bcc64
Publisher
Name not classified · citizenmatters.in
Type / language
web-page · language not classified
Published
2021-04-26
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Dated 26 Apr 2021. Independent civic journalism: over 2 million properties digitised but validation still in progress; the corporation has never met its property tax target; the state's Fourth Finance Commission found under 50% of properties on the ground were in the tax net.

Descriptive only — not page/paragraph exact
Claims linked
Deccan Herald — 318 crore rupees of tax evasion flagged at 13,600 properties in a second audit round deccanherald.com · 3 linked claims

Open original source ↗

Stable source ID
src-3bd1a8c64795633e
Publisher
Name not classified · deccanherald.com
Type / language
web-page · language not classified
Published
2026-02-24
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

February 2026. Second audit round under the self-assessment scheme using GPS mapping, drone imagery and digital verification. Site blocks automated fetching; headline and figures confirmed via search.

Descriptive only — not page/paragraph exact
Claims linked
News9 — Bengaluru civic body detects 688 crore rupees of property tax evasion using drones and GPS news9live.com · 3 linked claims

Open original source ↗

Stable source ID
src-1653cbf04e4a8112
Publisher
Name not classified · news9live.com
Type / language
web-page · language not classified
Published
2026-02-24
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-26
Dossier created
2026-08-26
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Dated 24 Feb 2026. Cumulative figure across both rounds, with the round-by-round split and the methods used: GPS door-to-door surveys, drone imagery, digitised built-up area data and on-ground use checks.

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.