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


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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