sdc_rasters rasters with more than 1000x1000 cells take minutes to create.
Typically city size rasters are fast (<second), country sized raster slow (minutes).
This is due to:
overly generic use of geographical objects: points x,y are to be rastered on a square grid, but are first translated into WKT (by raster) and then rasterized.
the calculation for the internal attacker value makes it slow, for each cell a R function is executed. This can be improved
The operation can be made a lot faster: seconds for a country sized raster.
sdc_rasters rasters with more than 1000x1000 cells take minutes to create.Typically city size rasters are fast (<second), country sized raster slow (minutes).
This is due to:
raster) and thenrasterized.The operation can be made a lot faster: seconds for a country sized raster.