How to adjust the height map with a Combo Overlay
Revision as of 13:19, 11 May 2022 by Hedi@tygron.com (talk | contribs)
Please note: This page is currently being updated.
It is now possibe to change the Digital Terrain Model (DTM) of a project, by using a Combo Overlay.
In the following example the roads of the project area will be lowered with 20cm -useful for e.g. simulating kerbs.
How to adjust the height map with a combo overlay.:
- Add a DTM Height Map Overlay to your project.
- Add an Average Overlay that selects a specified attibute. This can be a custom attribute or a more general one, such as NWB_ID.
- Add a Combo Overlay with the Height Map Overlay as input A, the Avg Overlay as input B, and with the formula: IF(GT(B, 0), SUB(A, 0.2), A).
- This Combo Overlay displays a height map with all roads 2cm lower, and all other areas as they were.
- Now use the Combo overlay in Current Situation > Terrain > Select Elevation Grid Overlay to implement the change on the elevation model and visualisation.