Foliage crown factor (Heat Overlay): Difference between revisions

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==Notes==
==Notes==
When configuring the Heat Overlay, different sources can be selected to define the Foliage height:
* Foliage can be calculated based on the FOLIAGE_CROWN_FACTOR. This calculation can be superseded when the [[DRPA Heat Module|Heat Overlay]] is configured to use either [[Area]]s or a [[GeoTiff]] to determine foliage height. In those cases the FOLIAGE_CROWN_FACTOR of constructions is unused.
* Buildings with [[Function|functions]] related to foliage. The [[Foliage_height_calculation_model_(Heat_Overlay)|foliage height calculation model]] will determine the foliage height using the height of the vegetation (as buildings) and the foliage crown factor attribute;
* Areas with as foliage height attribute, defining the foliage height for a whole area;
* [[GeoTiff]], defining a foliage height value for each cell in its raster.

Revision as of 09:40, 20 December 2019

Template:Overlay attribute

The foliage crown factor is used to calculate the extend of foliage, which can influence the calculation of the sky view and the shade. The height of the construction multiplied by the the crown factor yields the radius of the foliage.

The crown factor is used because the extend of foliage itself is not consistently available as geographical data in geo-services for land use. Instead, only the extent of tree trunks may be recorded.

How to

See also

Notes

  • Foliage can be calculated based on the FOLIAGE_CROWN_FACTOR. This calculation can be superseded when the Heat Overlay is configured to use either Areas or a GeoTiff to determine foliage height. In those cases the FOLIAGE_CROWN_FACTOR of constructions is unused.
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