# True Digital Orthophoto (TDOP) Series

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- ID: ` hk-landsd-openmap-true-digital-orthophoto `
- Publisher: [Lands Department](/publishers/1cae167e-12da-4272-bb19-3b9b2c0b3e92/) · [Markdown](/publishers/1cae167e-12da-4272-bb19-3b9b2c0b3e92/index.md)
- Categories: [Development, Geography and Land Information](/categories/development/) · [Markdown](/categories/development/index.md)
- Tags: Not stated
- Resources: 1
- Updated: 2025-07-27T16:34:10.521170
- Update frequency (publisher metadata): On an as-needed basis
- Harvest started: 2026-10-21T22:30:56.999Z
- Licence: Not stated
- Source: [Official metadata record](<https://data.gov.hk/en-data/api/3/action/package_show?id=hk-landsd-openmap-true-digital-orthophoto>)

Harvest started is the source harvest start associated with this record, not its precise retrieval time. Updated is an upstream metadata claim.

## Description

True Digital Orthophoto \(TDOP\) Series is produced from Digital Aerial Photos \(UE Version\) which are taken at flying height of about 13,000 feet, and processed using Digital Surface Model\. The TDOP has an image resolution of 0\.25m in terms of ground sample distance per pixel covering the whole territory of Hong Kong Special Administrative Region\.The TDOP Series is supplied on tile basis and each tile is equivalent to the coverage of the corresponding 1:5000 topographic map tile\. It consists of 192 tiles provided in GeoTIFF format including a World file with geo\-referencing data in Hong Kong 1980 Grid\.

## Resources

These are upstream resource links from metadata. Resource contents and endpoint availability have not been verified here.

### [True Digital Orthophoto (TDOP) Series](<https://portal.csdi.gov.hk/geoportal/?datasetId=landsd_rcd_1701762716904_4826>)

- Resource ID: ` 4d822bd7-0b3b-4776-b4a9-be4e2f5ea8f1 `
- Format: GEOTIFF
- Language: en, zh-Hant, zh-Hans
- Updated: 2025-07-27T16:34:10.531165
- API flag (publisher metadata): Y
- Original URL: ` https://portal.csdi.gov.hk/geoportal/?datasetId=landsd_rcd_1701762716904_4826 `

True Digital Orthophoto \(TDOP\) Series is produced from Digital Aerial Photos \(UE Version\) which are taken at flying height of about 13,000 feet, and processed using Digital Surface Model\. The TDOP has an image resolution of 0\.25m in terms of ground sample distance per pixel covering the whole territory of Hong Kong Special Administrative Region\.The TDOP Series is supplied on tile basis and each tile is equivalent to the coverage of the corresponding 1:5000 topographic map tile\. It consists of 192 tiles provided in GeoTIFF format including a World file with geo\-referencing data in Hong Kong 1980 Grid\.

## Specifications (source links)

### Publisher documentation

- [Publisher source](<https://portal.csdi.gov.hk/geoportal/?lang=en&datasetId=landsd_rcd_1701762716904_4826>) — source-linked; Dataset: sources

Original links supplied in publisher metadata. A source link does not mean that document content is hosted, parsed or verified here; any hosted extraction and its review scope are listed separately below.


Upstream metadata associations only; these links do not validate individual resources or document sections. No extracted document body is hosted here.

## Document availability

Parsed specifications and data dictionaries: not available for this dataset. [Document availability](/documents.md).