Vegetation fraction (Heat Stress Overlay): Difference between revisions
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The vegetation fraction is an attribute used by the [[Heat stress Overlay]], and indicates the amount of vegetation per square meter. The vegetation fraction can be determined based on the presence of multiple types of data: | The vegetation fraction is an attribute used by the [[Heat stress Overlay]], and indicates the amount of vegetation per square meter. The vegetation fraction can be determined based on the presence of multiple types of data: | ||
* If a [[building]] is present with a [[Building vegetation fraction (Heat Overlay)|vegetation fraction]] function value, this value is used. | * If a [[building]] is present with a [[Building vegetation fraction (Heat Stress Overlay)|vegetation fraction]] function value, this value is used. | ||
* Otherwise, the present [[terrain]]'s [[Terrain vegetation fraction (Heat Overlay)|VEGETATION_FRACTION]] attribute is used. | * Otherwise, the present [[terrain]]'s [[Terrain vegetation fraction (Heat Stress Overlay)|VEGETATION_FRACTION]] attribute is used. | ||
The vegetation factor cannot be overwritten by [[Area]]s. | The vegetation factor cannot be overwritten by [[Area]]s. | ||
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* The [[DPRA Heat stress report]] prescribes{{ref|DPRA-water-vegetation}} that during the way [[Water Terrain]] is considered vegetation, but at night is not considered vegetation. | * The [[DPRA Heat stress report]] prescribes{{ref|DPRA-water-vegetation}} that during the way [[Water Terrain]] is considered vegetation, but at night is not considered vegetation. | ||
| seealso= | | seealso= | ||
* [[UHI formula (Heat Overlay)|UHI formula]] | * [[UHI formula (Heat Stress Overlay)|UHI formula]] | ||
* [[Foliage height calculation model (Heat Overlay)|Foliage Height calculation]] | * [[Foliage height calculation model (Heat Stress Overlay)|Foliage Height calculation]] | ||
|references= | |references= | ||
<references> | <references> | ||
Revision as of 11:25, 13 April 2026
The vegetation fraction is an attribute used by the Heat stress Overlay, and indicates the amount of vegetation per square meter. The vegetation fraction can be determined based on the presence of multiple types of data:
- If a building is present with a vegetation fraction function value, this value is used.
- Otherwise, the present terrain's VEGETATION_FRACTION attribute is used.
The vegetation factor cannot be overwritten by Areas.
Notes
- The DPRA Heat stress report prescribes[1] that during the way Water Terrain is considered vegetation, but at night is not considered vegetation.
See also
References
- ↑ Ontwikkeling Standaard Stresstest Hitte ∙ T. de Nijs et al. ∙ Page(s): page 92 of 121 in section B1.2.1 Luchttemperatuur en luchtvochtigheid ∙ Found at: https://www.rivm.nl/bibliotheek/rapporten/2019-0008.pdf ∙ (last visited: 14-09-2023)
- Group
- Model attributes
- Daily average radiation • Daily average wind speed • Daily maximum temperature • Daily minimum temperature • Dates • Exclude buildings • Exclude water • Exclude foliage height m • Foliage areas • Hourly humidity • Hourly radiation • Hourly temperature • Max shadow distance • Sun altitude • Sun azimuth • Sun daily motion • Wind direction • Wind speed • Wind decline angle
- Building attributes
- Building elevation • Foliage height • Terrain elevation
- Related