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Key features of DTM

Product Type Digital Terrain Model (DTM)
Product Name 5m-grid DTM
File Format ArcInfo ASCII Grid (non-proprietary ASCII format)
File Name Whole_HK_DTM_5m.asc
Coverage Whole Territory of Hong Kong
Grid Size 5m x 5m on ground
File Size About 290MB
Accuracy ±5m at 90% confidence level
Data Source Derived from DOP5000 Series (December 2015 Release);
sourced from Aerial Photographs taken in January,
February 2014 and January 2015
Publication Year 2017
Revision Date Mar 2019
Geo-referencing Geo-referenced to the local coordinate system 'Hong Kong 1980 Grid' and 'Hong Kong Principal Datum'
Remark Please download the file and open it with software that can view ArcInfo ASCII Grid (non-proprietary ASCII format)