My map is in NAD1983 UTM Zone 9N. I am importing a raster that (when opened on it's own) looks fine and is in WGS84. When I add the raster to my map, it projects incorrectly. Any suggestions on how to start resolving this would be greatly appreciated. The raster was exported from Q.
So to 'fix' this, you need to know the real world extent of your input file in longitude/latitude coordinates.
The coordinate definition of WGS84 is wrong since the raw row/column format has to be translated
row/col long/lat
0,0 -180, 90
0, 192 180, 90
128, 96 0, 0 Greenwich, Equator
192, 0 -180, -90
192, 256 180, -90
so you have a cell size in the long/lat (ie X,Y) directions
I assume Q can't finish the provision of real world coordinates.
Luckily, my input is the entire earth surface with the western edge being at Greenwich. Do you know if there is a way to define this in ArcGIS without having to register points?
I'm also going to try to georeference in Q and then try Arc when I am back in the office tomorrow. Thanks again for your help.
I have the same issue. I know the real world extent of the file, how to update it?
That was actually my comment and should have had a "not" in there: ...the raster extents are not in decimal degrees...