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I'm interested if there is any ArcGIS tool which give us the same result like GRASS command r.sun. I need to get drop shadows. You can suggest and some other software. Thank you.

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up vote 3 down vote accepted

You can use Spatial Analyst extension from ESRI to perform the solar radiation modelling.
Refer the link below:

  1. Area solar radiation analysis
  2. Point solar radiation analysis


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The equivalent tool in ArcGIS is the solar radiation toolset, part of spatial analyst. I'm not sure of exactly what you mean by 'drop shadows', but it does support control over a large number of model options.

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