Template:GMS Manipulate Raster Workflow

3. Trim the raster.

Select a coverage (or create a new coverage) in the Map module. Select the Create Arc File:Tool CreateArc.png tool and draw a closed set of arcs. While the arcs are selected, go to Feature Objects | Build Polygons. Use the Select Polygon File:Tool SelectPoly.png tool to select the polygon just created. Right-click a image in the GIS data and select Convert To | Trimmed Raster. Save a file with the trimmed data.

4. Resample a raster image.
Right-click on the image object in the project explorer and select the Convert To | Resampled Raster command. Use the Resample and Export Raster dialog to specify how to resample the image data values. Save the new resampled raster file.

5. Merge mulitple images.
Select two or more image items in the project explorer by holding down the Shift key while selecting each item. Right-click on one of the selected objects and select Convert To | Merged Raster. Save a file with the merged data.