I am running into a problem that I cannot reproduce with small datasets.
I am merging a massive number of rasters with the "MAXIMUM" option - most of the inputs are NoData at each cell and one value in one of the input rasters. I am specifying:
arcpy.MosaicToNewRaster_management(huge_list, outFolder, outName", "32_BIT_SIGNED", "", 1, "MAXIMUM")
If my input cell is of value 255, (max of Nodata (x N), 255) I am getting NoData out. Looks like a bit depth / NoData handling issue to me.
I'd sent it to support but I can't easily reproduce with test data so I thought I'd ask around here first.
I will probably use the Cell Statistics tool to work around the problem, as it seems to have fewer bit depth issues.