I'm trying to combine two rasters in 10.3 using a con statement with the raster calculator in map algebra. (ie - con (raster 1 ==1, raster 1, raster 2)) where raster 1 is a smaller extent and does not have continuous values, and raster 2 is a land use raster. the output is always equivalent to raster 1 only. i've tried the CON tool, the "plus" tool instead of raster calculator (raster 1 + raster 2; so that i can then reclassify). with the "plus" tool, i get the combined values, but the values for raster 2 where there should be NoData for raster 1 are missing.
this is a simple process i've done many times with prior versions, so what am i missing?