Hi I have two raster datasets one is Shaded relief DEM and another is high resolution optical imagery. The shaded relief is bigger in spatial extent than imagery. I want to make extent of both imagery exactly same, hence I would like to clip that. Here the most important thing is that the optical imagery is not square. It exists according to the outline of my study area. For this I went into "Resize data" and selected Shaded relief DEM and selected "Spatial subset". After this I selected "File" and then selected high resolution imagery to make the extent of both the datasets similar. The resultant imagery is clipped as "square" and not exactly the same as my optical imagery (which is shaped according my study area). How can I make it exactly similar to my study area (not square or rectangle) ? Regards Yask