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Why the default value of the azimuth in the hillshade is 315?

Discussion created by Jamal432@gmail.com on Aug 28, 2010
Latest reply on May 11, 2011 by tkaye
Why the default value of the azimuth in the hillshade is 315?

As I understand, the hillshade map represent the shade that the sun makes form specific location

1. Why the default azimuth is 315? It should be 90 to represent the East
2. What does of the values in the hillshade represent?

Please, see the attached image

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