Foliage crown factor (Heat Overlay): Difference between revisions

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{{Overlay attribute
{{Building attributes
|attribute=FOLIAGE_CROWN_FACTOR
| <onlyinclude>
|unit=ratio
{{Building attributes|type=row|group=Heat Overlay
|functionvalue=Foliage crown factor
|attribute=FOLIAGE_CROWN_FACTOR
|description=The ratio between the height of tree trunks and the radius of the foliage of the tree.
|unit=ratio
}}
|functionvalue=Foliage crown factor
|description=The ratio between the height of tree trunks and the diameter of the foliage of the tree.
|icon=
}} </onlyinclude>}}


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 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 Building multiplied by the the crown factor yields the diameter 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.
The crown factor is used because the extend of foliage itself is not generally available as geographical open data. Instead, often only the extent of tree trunks are provided.


==Notes==
{{article end
* 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 This calculation can be superseded when the [[DRPA Heat Module|Heat Overlay]] is configured to use either [[Area]]s or a [[GeoTiff]] to determine foliage height.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.
|notes=
 
* Foliage can be [[Foliage height calculation model (Heat Overlay)|calculated]] based on the FOLIAGE_CROWN_FACTOR. This calculation can be superseded when the [[Heat Overlay]] (set to use the [[DPRA Heat Module]]) is configured to use either [[Area]]s or a [[GeoTIFF]] to determine foliage height. In those cases the FOLIAGE_CROWN_FACTOR of [[Building]]s is unused.
==How to==
|seealso=
* [[How_to_adjust_the_foliage_height_and_crown_factor|How to adjust the foliage height and crown factor]]
* [[Foliage height calculation model (Heat Overlay)]]
* [[Foliage crown factor (Function Value)]]
|howtos=
* [[How to adjust the foliage height and crown factor]]
* [[Trees and foliage tutorial]]
}}


==See also==
{{HeatOverlay model attribute nav}}
* [[Foliage_height_calculation_model_(Heat_Overlay)|Foliage height calculation model]]

Latest revision as of 14:09, 26 January 2024

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 Building multiplied by the the crown factor yields the diameter of the foliage.

The crown factor is used because the extend of foliage itself is not generally available as geographical open data. Instead, often only the extent of tree trunks are provided.

Notes

How-to's

See also