I´m trying to calculate the hillshade models from a zone for every hour during one month. I´m using the GDAL, gdaldem hillshade (I don´t know if there is another tool/library).
The problem is how to model the different situations during a day from the time and not from the elevation and azimuth of the sun. I would like use the time to generate the hillshade model for this time, so the modelling of my surface uses the different situations of elevation and azimuth for this time for my zone.
If I understood it the elevation and azimuth parameters describe the sun's position. So for the same elevation /azimuth parameters the hillshades describe the shadows for different times (for example: the situation of the sun as "elevation 1.79 and azimuth 121" describes the shadows for a part of my zone for 01:00:00 pm and for another part for 01:30:00 pm).
Is it possible to generate hillshade models describing the shadows in a moment for a zone?