How to adjust the height map with a Combo Overlay: Difference between revisions
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File:Add_AVG_Overlay1.jpg|2.Add an Average Overlay that selects a specified attibute - NWB_ID. | File:Add_AVG_Overlay1.jpg|2.Add an Average Overlay that selects a specified attibute - NWB_ID. | ||
File:Add_Combo_Overlay1.jpg|3. Add a Combo Overlay with the Height Map Overlay as input A, and the Avg Overlay as input B. | File:Add_Combo_Overlay1.jpg|3. Add a Combo Overlay with the Height Map Overlay as input A, and the Avg Overlay as input B. | ||
File:Combo_Overlay2.jpg|4. This Combo Overlay displays a height map with all roads (with NWB_ID as attribute) | File:Combo_Overlay2.jpg|4. This Combo Overlay displays a height map with all roads (with NWB_ID as attribute) 20 cm lower, and all other areas as they were. | ||
File:Add_Overlay_As_Terrain1.jpg|5 .Now use the Combo overlay in Current Situation > Terrain > Select Elevation Grid | File:Add_Overlay_As_Terrain1.jpg|5 .Now use the Combo overlay in Current Situation > Terrain > Select Elevation Grid | ||
</gallery> | </gallery> |
Revision as of 13:22, 11 May 2022
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.