Hong Kong: 0.5 meter DTM and DSM - CEDD | Civil Engineering and Development Department | Hong Kong Government

You can use the Plex-Earth features to create terrain models from free, quality data you can find online.

About the Data

Data Provider: CEDD | Civil Engineering and Development Department | Hong Kong Government 

Link: Spatial Data Portal

Data Type: Digital Terrain Model (DTM), Digital Surface Model (DSM)

Resolution: 0.5 meters

Terms of Use: Go to Spatial Data Portal → Select i (information) → Terms of Use will appear as a pop-up page.

Terms of Use will appear during the download process, where they have to be accepted beforehand. A PDF of the terms of use is downloaded with the GeoTIFF file.

Data Download

1. Visit the following URL: 
   https://sdportal.cedd.gov.hk/#/en/lidar

2. Select Year → Select Raster DTM or Raster DSM → GeoTIFF → Select Area from the Map → Download
   
    

Use Data for Terrain Model creation

After downloading the data, you can now proceed with creating a terrain model in CAD.

1. In AutoCAD or BricsCAD, go to the Plex-Earth ribbon → click on the Create Terrain dropdown box → Terrain from GeoTIFF → load the GeoTIFF downloaded.

2. In the Import GeoTIFF palette, specify the area by clicking on the Select Area button, then use your mouse cursor to draw a rectangle, and select the desired resolution using the slider.

3. Click on the Import Terrain button

4. Select the Surface Type from the options available:

   • Contour Polylines

   • Points

   • TIN Mesh

   • Civil 3D Surface

   • Create Terrain Model

For the first four options, CAD objects are directly imported, ready to be used in CAD or other software.

The last option creates a Plex-Earth terrain model, which can be saved in your DWG, and with the help of Plex-Earth, customize the terrain further and also insert the data as CAD objects later on.

Check out the full guide here: Create Terrain from GeoTIFF

Here is the result of a 0.5-meter DSM!