Terrain elevation prequel (Shadow Overlay)

Name	Prequel	Underlying data	Unit	Range	No data	Description
Terrain elevation	TERRAIN_ELEVATION	Shadow Prequel	m (datum)	-10000 to 10000	Clamped to range	Used for initializing the digital terrain model used for this Shadow Overlay.

Notes

• The values in this prequel grid are clamped between the mentioned min and max. No data values are not allowed. An Average Overlay can be used to fill in the NO_DATA values of an other grid overlay.
• The terrain elevation is interpreted as datum heights.

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Shadow Overlay

Model attributes

Dates • Max foliage radius • Max shadow distance • Sun altitude • Sun azimuth

Shadow features

Foliage Area • Foliage crown factor • Foliage height

Prequels

Building elevation • Foliage height • Terrain elevation

Calculation models

Foliage height • Shade

Result types

Shade • Foliage