shade_rgb(self, rgb, elevation, fraction=1.0, blend_mode='hsv', vert_exag=1, dx=1, dy=1, **kwargs)
An (M, N, 3) RGB array, assumed to be in the range of 0 to 1.
An (M, N) array of the height values used to generate a shaded map.
Increases or decreases the contrast of the hillshade. Values greater than one will cause intermediate values to move closer to full illumination or shadow (and clipping any values that move beyond 0 or 1). Note that this is not visually or mathematically the same as vertical exaggeration.
The type of blending used to combine the colormapped data values with the illumination intensity. For backwards compatibility, this defaults to "hsv". Note that for most topographic surfaces, "overlay" or "soft" appear more visually realistic. If a user-defined function is supplied, it is expected to combine an MxNx3 RGB array of floats (ranging 0 to 1) with an MxNx1 hillshade array (also 0 to 1). (Call signature func(rgb, illum, **kwargs)
) Additional kwargs supplied to this function will be passed on to the blend_mode function.
The amount to exaggerate the elevation values by when calculating illumination. This can be used either to correct for differences in units between the x-y coordinate system and the elevation coordinate system (e.g. decimal degrees vs. meters) or to exaggerate or de-emphasize topography.
The x-spacing (columns) of the input elevation grid.
The y-spacing (rows) of the input elevation grid.
An (m, n, 3) array of floats ranging between 0-1.
Use this light source to adjust the colors of the rgb input array to give the impression of a shaded relief map with the given elevation.
The following pages refer to to this document either explicitly or contain code examples using this.
matplotlib.colors.LightSource.__init__
matplotlib.colors.LightSource
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