Name

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      TOPO2

Purpose

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      Make a shading array for a given data array.

Category

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Calling Sequence

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      sh = topo2(z, az, ax)

Inputs

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      z = array of elevations to shade. in

Keyword Parameters

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Keywords

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        /SCALE means scale min and max shading to 0 and 1.
        MIN=mn Scale min shading to mn instead of 0.
        MAX=mx Scale max shading to mx instead of 1.
        AZ=az light source angle from zenith in deg (def = 45).
        AX=ax light source angle from x axis in deg (def = 45).

Outputs

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      sh = Returned shading array (0 to 1). out

Common Blocks

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Notes

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Modification History

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      R. Sterner, 2007 Jun 29
      R. Sterner, 2007 Jul 05 --- Corrected ax,az.
  Copyright (C) 2007, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.