[GRASS-user] r.sun - what unit for a half-meter resolution grid?

Hi there,

I’ve been using r.sun to compute irradiation on a raster with a resolution of 0.5 m². The output of r.sun is in WH/m², does this mean that I have to convert the output to another unit (pixel size = 0.25 m², WH/m² output from r.sun * 4? Or perhaps output / 4, since the output’s for 1 m² but recorded on a 0.25 m² pixel?) or should I leave the output as it is? I know it’s kind of a dumb question, but I’m pretty confused and don’t want to just trust in comparing my values with measurements and assuming that a certain conversion factor is correct :wink:

Thanks!
Daniel

B.Sc. Daniel Lee

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