aspect

Luo_Suppe2026-08-15

gma.etools.aspect

function aspect(in_src, out_dst, compute_edges = None, band = 1, trigonometric = False, zero_for_flat = False, algos = "Horn", **kwargs):

Calculate aspect from any supported DEM raster file!

Parameters:

in_src: str.

The input raster file path.

out_dst: str.

The output raster file path.

Optional:

compute_edges = bool. Default True.

Whether to compute raster edge data and data near no data values.

Setting values that are not True are treated as False.

band = int. Default 1.

Number of the element calculation band. Start with 1.

trigonometric = bool. Default False.

Whether to use (triangular) angles instead of azimuths. Setting values that are not True are treated as False.

Azimuth angle: take the true north direction as 0��, and the horizontal included angle between the clockwise direction and the target direction line.

(Triangular) angle: 0�� from due east. The horizontal angle between the counterclockwise direction and the target direction line.

zero_for_flat = bool. Default False.

Whether to assign 0 to areas with 0�� aspect. The default (False) assignment is -9999.

Setting values that are not True are treated as False.

algos = str. Default 'Horn'.

Surface algorithm. May be 'Horn' or 'ZevenbergenThorne'.

**kwargs:

Other parameters passed to translate.

Returns:

Type: DataSet.