Tim Michelsen schrieb: > > > what do the inputs for i.sunshine in GRASS7 mean? > > > > > > i.sunhours doy=name lat=name > > Achim: > > I guess > > > > doy = day of year > > > > lat = latitude > > > > While doy in (1-365) > > And lat in (0-90)? > > > > Should be. But why "name"?? > Timmie: > I thought the same. > > But the doc is strange: > > doy=name > Name of the doy input map >
DOY is day of year, and it is a raster map, but I'm not sure if it should be 0-365, 1-366, 1-365, 0-365.25, ... a lot of the other GIPE modules (grass-addons) use that, but I have no idea why it wants those to be in raster maps instead of just a single integer day or floating point day+hours/24+minutes/1440. maybe it is intended for satellite passes where there could be a different time-of-day as the sat passes overhead or for multiple passes on the same image? ?? no idea. also from our tests with r.sun I'm not sure how much time a pre-formed lat= map really saves vs. calculating it e.g. once per raster row with the proj library, or even calculating for each individual cell on-the- fly. see https://trac.osgeo.org/grass/ticket/498, the r.sun page in the wiki, and the threads on the -dev mailing list about it. the documentation does need a lot of enhancement.. perhaps there is more documentation in the GIPE section of the addons SVN? there are some examples there anyway. it seems the modules still need a bit of GRASSification done to them too. Hamish _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user