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Collation of Geospatial Data

In accordance with the Project Administration Handbook (PAH) for Civil Engineering Works, the Operational Instruction of Architectural Services Department, and the PAH of Electrical and Mechanical Services Department, Works Departments or their consultants/contractors are required to submit Geospatial Data produced from works projects to the Lands Department (LandsD) for its map updating work.

What is Geospatial Data

Geospatial data from works project ("Geospatial Data") means the following four classes of data originated from both approved project design and as-built survey upon phased completion of works projects:-

  • Geographic Information System (GIS) data in format meeting 1:1000 Basic Mapping Specifications promulgated by LandsD;
  • Building Information Modelling (BIM) model;
  • Computer-Aided Drafting (CAD) Drawing; and
  • Georeferenced photo image and point cloud data collected from Vehicle Mobile Mapping System and Unmanned Aerial Vehicle (UAV), etc., and model so derived.

Submission Requirements

Requirements of submitting Geospatial Data with different works project estimates are as below:-

Data to be submitted Works Project Estimates GIS data meeting LandsD 1:1000 Basic Mapping Specifications BIM model CAD Drawing Georeferenced photo image, point cloud and derived model
above $30 million not applicable
(if available)
not more than $30 million not applicable
( submit either BIM model
or drawing in CAD format )

(if available)

Geospatial Data Standards and Submission Channels

The Geospatial Data should be in compliance with the following standards and should be submitted through the corresponding channels:-

Type of Data Submission Method Data Specification / Guideline / Other reference
GIS Data Via Cloud-based Production Mapping Platform (CPMP) (guideline)
  1. 1:1000 Basic Mapping Specifications
BIM Model Via Government BIM Data Repository (GBDR) (guideline)
  1. DEVB TC(W) No. 8/2021
  2. DEVB BIM Harmonisation Guidelines for Works Departments
CAD Drawing Data less than 4GB:
Via Geospatial Data Submission Platform (GDSP) (guideline)

Data larger than 4GB:
Please contact
  1. DEVB CAD Standard for Works Projects (CSWP)
  2. CEDD Drafting Specifications for Engineering Survey
Others (e.g. photo, image, point cloud, derived model, etc.) (For Reference Only)
  1. [e.g.] Specifications of Photo Images taken by UAV
  2. [e.g.] Specifications of Mobile Mapping System Data

When to Submit Geospatial Data

Geospatial Data originated from both approved design and as-built surveys should be submitted to LandsD according to the following timeline –

Geospatial Data Submission timeline
Geospatial Data originated from approved design Before commencement of construction works of each works contract under a project
Geospatial Data originated from as-built surveys Upon completion of construction works of each works contract# under a project or not later than the corresponding infrastructure / area is open for use whichever is earlier

# If the works are carried out in different sections, Geospatial Data should be submitted upon each sectional completion.

Help and Support

Any question on collation of geospatial data, please refer to "Frequently Asked Questions". If further assistance is required, please leave us a message below:

I am looking for assistance on :-

Enquiries related to standards or submissions of different geospatial data
Enquiries related to submission channels

Content of enquiries

Personal Information Collection Statement

The personal data collected in this form will solely be used by Lands Department for the purposes of following up your enquiry in this form.

The provision of your personal data is voluntary. If you do not provide personal information, Lands Department may not be able to reply to your enquiry. The personal data collected in this form will not be disclosed or transferred to any other third parties without your prior consent.

You have the right to request access to and correction of your personal data provided in this form. Please note that we may refuse to comply with a data access request in the circumstances specified in section 20 of the Personal Data (Privacy) Ordinance (Cap. 486). Your requests should be made to the Departmental Personal Data Controlling Officer (Attn: Senior Land Surveyor/Technical Information).

Address: Survey and Mapping Office, Lands Department,
23/F North Point Government Offices,
333 Java Road,
North Point, Hong Kong

Contact Information