Currently i am trying to calculate sunshine hours duration from r.sun (GRASS Plug in ) from QGIS 2.12. I want to calculate sunshine duration for 21 st jun and 21st December for same elevation data set. After time consuming process i managed to get sunshine duration. But when i saw output for summer as well as winter both duration hours value are same. Is it related to DEM size or tools issue. because similar process i run with ArcGIS solar radiation tools and got very accurate results. if anybody worked on this please let me know


Have you seen this blog post using r.sun.hourly from GRASS: http://courses.neteler.org/will-the-sun-shine-on-us/

  • Yes thanks. nice post actually but its difficult ti get my answer from that post.. Feb 23 '16 at 10:42
  • please add the key elements of that post to this answer, incase in the future it goes away.
    – Ian Turton
    Feb 23 '16 at 13:32

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.