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How much does time does the ArcGIS solar radiation tool take to give solar map for day of about 50 km area?

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That depends on you data resolution and computer specifications including RAM and processing power. It took me about 1-day to do a college campus at about 2m resolution.

I cannot link to GeoNet as it is behind a log in wall but on this forum I found that,

"We are using the tool to calculate direct and diffuse incoming solar radiation for a valley in the mountains. The cell size of the raster is 1 m x 1 m and it has around 45'000 columns by 42'000 rows - it's quite big. We try to calculate the radiation for the period of a whole year with a time interval of 14 days and 0.5 hours. The output will be a single file."

This took about 1 month on a high spec PC.

  • i have core i7 with 8 Gb ram – ayesha javaid Oct 23 '14 at 15:52
  • How many rows and colomns? – If you do not know- just GIS Oct 23 '14 at 16:05
  • sorry i am new to this i got the DEM from teacher any idea where to look for in arc info for rows and columns? – ayesha javaid Oct 23 '14 at 16:46
  • arccatalog, right click > Properties – If you do not know- just GIS Oct 23 '14 at 16:53
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    It is impossible to give you an exact answer as machine specs differ so much and running out of RAM and moving to a paging file or similar makes such a difference. Ditto for software version but...using simple logic your process is 0.2% of the one I cite so you would expect it to take 14 hours +- a huge amount of uncertainty – If you do not know- just GIS Oct 23 '14 at 17:10

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