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What is the difference between area solar radiation(spatial analysis) and sun shadow volume (3D analysis). Are they both used to show sunlight volume?

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    Did you search their help for "sunlight volume"?
    – PolyGeo
    Jun 14, 2017 at 20:20

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ArcGIS Solar Radiation Help

ArcGIS Sun Shadow Volume Help

What I make up from their help pages is the following:

  • Sun Shadow Volume: Calculates the shadow cast by each feature using sunlight for a given date and time. Thus it calculates a shadow.
  • Area Solar Radiation: Derives incoming solar radiation from a raster surface. Thus it calculates the amount of radiation received by a given raster cell, both direct and indirect(How solar radiation is calculated)

So it seems that your goal determines which tool to use.

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