How to improve the estimated foliage overlay
Revision as of 10:20, 22 December 2023 by Frank@tygron.nl (talk | contribs)
How to compute a foliage estimation from an infrared WMS:
- Add a new WMS Overlay, with "Infrared" as its Project Source. This source is available by default.
- Select the most recent infrared layer.
- As result type, select the "Red" color channel.
- Add a Combo Overlay, and set Grid Overlay "A" to the created WMS Overlay with the Infrared Project Source.
- As formula for the Combo Overlay, enter "GT(A, 160)"
- Duplicate the WMS Overlay, and set the result type of the duplicate to the "Green" color channel.
- Add the second WMS Overlay to the Combo Overlay as Grid Overlay "B".
- Change the formula for the Combo Overlay to MUL(GT(A, 160), GT(B, 80),14)
- Add a Heat Overlay, and open its configuration wizard.
- Continue to the step regarding Foliage, and in that step opt to use a grid as input.
- As foliage input grid, select the configured Combo Overlay.
- The Heat Overlay now performs calculations using foliage which is derived from infrared imagery.