pyflwdir.FlwdirRaster.upscale_error

FlwdirRaster.upscale_error(other: FlwdirRaster, idxs_out: ndarray) → ndarray

Return an error map for the upscaled flow directions.

A flow direction is valid when the first outlet pixel downstream of a cell’s outlet is located in the cell indicated by that flow direction.

The returned values are 1 for valid links, 0 for erroneous links, and 255 for cells with missing flow-direction data.

Parameters:

• other (FlwdirRaster) – Upscaled flow-direction raster to check.

• idxs_out (2D array of int) – Linear indices of the high-resolution outlet cells for other.

Returns:

flwerr – Error map: 1 for valid links, 0 for erroneous links, and 255 for no-data.

Return type:

2D array of uint8 with other.shape