Vegetation fraction (Heat Stress Overlay): Difference between revisions

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The vegetation fraction is an attribute used by the [[Heat Overlay]]. The vegetation fraction is the amount of vegetation per square meter. The vegetation fraction is currently obtained as an [[attribute]] from these items:
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:
* [[Function|Functions]]: The function value '''GREEN_M2''', which represents the same thing;
* If a [[building]] is present with a [[Building vegetation fraction (Heat Stress Overlay)|vegetation fraction]] function value, this value is used.
* [[Terrain|Terrains]]: The terrain attribute '''VEGETATION_FRACTION'''.
* Otherwise, the present [[terrain]]'s [[Terrain vegetation fraction (Heat Stress Overlay)|VEGETATION_FRACTION]] attribute is used.


==Note==
* As seen above it cannot be overwritten by [[Area|Areas]].


==See also==
 
* [[UHI_formula_(Heat_Overlay)|UHI formula]]
{{article end
* [[Foliage_height_calculation_model_(Heat_Overlay)|Foliage Height calculation]]
| notes=
{{Template:HeatOverlay_model_attribute_nav}}
* The vegetation factor cannot be overwritten by [[Area]]s.
* The [[DPRA Heat stress report]] prescribes{{ref|DPRA-water-vegetation}} that during the day [[Water Terrain]] is considered vegetation, but at night is not considered vegetation.
| seealso=
* [[UHI formula (Heat Stress Overlay)|UHI formula]]
* [[Foliage height calculation model (Heat Stress Overlay)|Foliage Height calculation]]
|references=
<references>
{{ref|DPRA-water-vegetation
  |name=Ontwikkeling Standaard Stresstest Hitte
  |author=T. de Nijs et al.
  |page=page 92 of 121 in section B1.2.1 Luchttemperatuur en luchtvochtigheid
  |source=
  |link=https://www.rivm.nl/bibliotheek/rapporten/2019-0008.pdf
  |lastvisit=14-09-2023
}}
</references>
|api=* [[Api session event editor building set function value]]
*  [[Api session event editor terraintype set attribute]]
* [[Api session event editor functionoverride set attribute]]
}}
 
{{HeatOverlay model attribute nav}}

Latest revision as of 08:10, 14 July 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:


Notes

See also

API Endpoints

References

  1. ↑ 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)
Heat Stress Module
Heat Stress Module
Tutorials
Overview
Theory
Benchmarks
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
Group
Building attributes
Bowen ratio • Foliage height • Foliage crown factor • Vegetation fraction
Terrain attributes
Bowen ratio •  Vegetation fraction
Area attributes
Foliage height
Group
Prequels
Building elevation • Foliage height • Terrain elevation
Related
Calculation models and formulas • Feature attributes • Model attributes • Result types


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