How to adjust the height map with a Combo Overlay: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
Line 1: | Line 1: | ||
It is now possibe to change the [[Digital Terrain Model Overlay|Digital Terrain Model (DTM)]] of a project, by using a [[Combo Overlay]]. | It is now possibe to change the [[Digital Terrain Model Overlay|Digital Terrain Model (DTM)]] of a project, by using a [[Combo Overlay]]. | ||
Line 10: | Line 10: | ||
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) , and all other areas as they were. | 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 13:24, 11 May 2022
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.