I need to calculate the solar radiation for a region of interest, and I am using the 'solar radiation' tool implemented in ArcGIS (10.1) and a DEM with cell size 1x1. It is 3 days now that ArcGIS is processing the DEM, and it is at 31%. I was wondering if it is a sound approach to convert (how?) the DEM at a coarser resolution (say, 10x10). Furthermore, since my aim was to use the obtained raster as an Independent Variable in a Logistic Regression model, and since the other rasters I will use are at cell size 1x1, I am wondering if there is anything methodologically wrong in introducing disparities in the raster used as far as cell size is concerned?
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