iwfm.gis.grid_shadedrelief

iwfm.gis.grid_shadedrelief(source, slopegrid, aspectgrid, shadegrid, az=315.0, alt=45.0, z=1.0, scale=1.0, NODATA=-9999)[source]

Create a shaded relief ASCII grid from an ASCII DEM.

Also outputs intermediate grids for slope and aspect

Parameters:

  • source (str) – ASCII DEM file name

  • slopegrid (str) – slope grid (steepness) file name

  • aspectgrid (str) – aspect grid (direction faced between 0 and 360) file name

  • shadegrid (str) – output file name

  • az (float, default=315.0) – azimuth (sun direction) in degrees

  • alt (float, default=45.0) – altitude (sun angle) in degrees

  • z (float, default=1.0) – elevation exageration

  • scale (float, default=1.0) – resolution

  • NODATA (int, default=-9999) – value if no data

Return type:

nothing