The resulting raster will be a shaded relief map (a hill shading) based on the sun altitude, azimuth, and the z factor. The z factor is a conversion factor from map units to elevation units.

Returns a raster of TypeShort.

This operation uses Horn's method for computing hill shading.

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6. #### def apply(r: Op[Raster], azimuth: Op[Double], altitude: Op[Double], zFactor: Op[Double]): DirectHillshade

Creates a hillshade operation directly from azimuth, altitude, and zFactor parameters.

Creates a hillshade operation directly from azimuth, altitude, and zFactor parameters.

azimuth

Degrees clockwise from north of light source.

altitude

Degrees above horizon of the light source.

zFactor

Factor that convers altitude units to map units. (map units per elevation unit)

7. #### def apply(aspect: Aspect, slope: Slope, azimuth: Op[Double], altitude: Op[Double]): IndirectHillshade

Creates a hillshade operation using a precomputed slope and aspect.

Creates a hillshade operation using a precomputed slope and aspect.

aspect

Aspect operation

slope

Slope operation

azimuth

Degrees clockwise from north of light source.

altitude

Degrees above horizon of the light source.

8. #### def apply(r: Op[Raster]): DirectHillshade

Create a default hillshade raster, using a default azimuth of 315 degrees, altitude of 45 degrees, and z factor of 1.

Create a default hillshade raster, using a default azimuth of 315 degrees, altitude of 45 degrees, and z factor of 1.0.

r

Raster to for which to compute the hill shading.

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