Tehran City Hall Tackles Thousands of Duplicate Images in Digital Records

Tehran Municipality's Department of Urban Documentation now estimates it is managing a backlog that accumulated across at least four separate digitisation drives since 2014, each launched by a different administration with its own software standards and storage protocols. The result: thousands of duplicate image files — aerial photographs, building permit scans, streetscape records — sitting across disconnected servers, inflating storage costs and slowing the planning workflows that city engineers rely on daily.

The timing matters. Iran is in the middle of a politically charged transition following the death of Ayatollah Khamenei, and Tehran's municipal leadership is under pressure to demonstrate administrative competence at precisely the moment when the city's governance is being scrutinised most closely. For the urban planning directorate, a chaotic image archive is not an abstract IT problem — it directly affects the speed of building permit approvals in fast-developing districts like Shahrak-e Gharb and the documentation of heritage structures in the Oudlajan neighbourhood of District 12.

How the Duplication Problem Built Up

The roots of the crisis go back to 2014, when the municipality launched its first large-scale effort to digitise physical planning files under a programme called the Integrated Urban Information System, known by its Persian acronym SAMP. That drive was incomplete when a new city administration took over in 2017 and commissioned a parallel system through the Tehran Urban Research and Planning Centre on Valiasr Street. Neither system spoke cleanly to the other.

A third archiving effort followed in 2019 under a smart-city initiative tied to the municipality's cooperation agreement with the Iran Telecommunication Research Center. Each successive programme ingested large volumes of aerial and satellite imagery without first cross-checking what had already been catalogued. By 2022, internal audits — referenced in budget documents submitted to the Tehran City Council — flagged that storage costs for the urban documentation division had risen by roughly 40 percent over three years, with redundant files identified as a primary driver.

The problem compounded further during the Covid-19 period, when field verification of records was suspended for much of 2020 and 2021, leaving automated batch uploads to run without the manual quality checks that would normally catch duplicate submissions. Districts along the northern belt — Niavaran, Zafaraniyeh, and Velenjak — which see high volumes of construction activity and therefore the most frequent aerial resurveying, accumulated the densest layers of redundant imagery.

What the Municipality Is Now Doing

Tehran Municipality confirmed earlier this year that it had contracted with a domestic software firm to deploy a deduplication and metadata-standardisation tool across the primary servers housed at the municipality's data centre near Beyhaghi Terminal in eastern Tehran. The project, budgeted at approximately 85 billion rials according to figures presented to the City Council's Infrastructure Committee in March 2026, is scheduled to complete its first phase by the end of Shahrivar — late September by the Western calendar.

The practical stakes for ordinary Tehranis are real. Building permit delays in districts like District 22 near Chitgar Lake have been partly attributed to staff spending time manually identifying which version of a land-parcel image is current and which is an outdated duplicate. Architects and contractors working on projects along the Hakim Expressway corridor have long complained informally about documentation inconsistencies, though the municipality has not formally linked those delays to the image archive problem in any public statement.

The deduplication project will use hash-matching algorithms to flag files that are byte-for-byte identical, then apply a secondary review layer for near-duplicate images — photographs taken of the same location days apart — which are more common and more difficult to resolve automatically. Staff from the Urban Documentation Department are scheduled to begin training on the new validation workflow in August.

For residents and developers waiting on planning decisions, the most direct advice is to ensure that any documentation submitted to district offices after September includes a clear date stamp and geo-reference code on every image file — a step that municipality guidance circulated in May 2026 already recommends, and one that will make it significantly easier for the new system to classify incoming records correctly from the outset.