Define projection on raster problem

Question

I have a raster map that needs to be defined in 2 different coordinate systems. I added control points to my unprojected map and rectified it. It's OK for the first coordinate system. (European datum ed50 30 3).

Now, I want to project this raster to ed50 30 6. So right click to my raster under catalog | properties | spatial reference tools, and I choose new projected system and click ok.

When I restart ArcGIS, adding my new raster, the coordinate system doesn't change. Projection is listed as (ed50 30 6) but the map location doesn't change (I can understand from grids on the map it still has same coordinates)

Am I skipping some steps?

Answer 1

I assume that you are not loading it into the same map document as the original projection was defined from. As the Map Data Frame Properties retain the projection from the original data. of course to can transform the data, but you can also project the data on the fly.

But the data can still exist with it's new projection:

The two tools to Project the data are "Define Projection" (if the data projection wasn't defined initially):

And Project Raster to project from one Projection to the other to permanently keep a second copy of the data in the new projection: There may also be the Resampling Technique set to Bilinear or Cubic for continuous data. And if known a Geographic Transformation PARAMETER see image above

Answer 2

Use the Project Raster tool, found in the Data Management toolbox. If you follow the steps you described, it's "defining" the coordinate system instead of mathematically transforming the map into the new coordinate system.