Vegetation fraction (Heat Overlay)

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 Green space 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 that during the way Water Terrain is considered vegetation, but at night is not considered vegetation.

See also

• UHI formula
• Foliage Height calculation

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Heat Module

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Model attributes

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

Bowen ratio • Foliage height • Foliage crown factor • Vegetation fraction

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Building elevation • Foliage height • Terrain elevation

Related

Calculation models and formulas • Feature attributes • Model attributes • Result types