pysoilmap.features¶

Computation of topographic variables from a DEM.

The DEM’s axes ordering is assumed to be (Y, X) in accordance with the same convention as for numpy.meshgrid() or matplotlib.pyplot.imshow().

Functions¶

`diff_finite`(dem, cellsize, dx, dy)	Calculate a higher-order derivative of the DEM by finite differencing successively in X and then Y direction.
`diff_gauss`(dem, cellsize, dx, dy[, sigma])	Applies a Gaussian derivative filter to the given DEM.
`get_latitude`(xs, ys, crs)	Calculate the latitude for each pair of (X, Y) coordinates in the given CRS.
`rad_angle`(aspect, slope, latitude[, declination])	Return the cosine of the "radiation angle" according to Herbsta, et al 2006 [1].
`sun_exposure`(grad_dir, slope, latitude[, ...])	Return the cosine of the angle between surface normal and the sun at midday.

Topography(dem, cellsize[, diff, indexing, ...])

Calculates various topographic indices at each pixel from on a given DEM.