How can I crop imagery to an irregular shape (i.e. an area) when exporting?
Using Global Mapper v6.06 and later, all that you need to do to crop to an area on export is first either load the file containing the area feature or draw it using the Digitizer or Measure Tool. Then, select the area feature with either the Pick Tool or the Digitizer Tool, then select the appropriate File->Export Raster and Elevation Data menu command. The Export Bounds tab of the export options dialog that appears will have an option at the bottom to “Crop to Selected Area”. Select this option and the export will be cropped to the selected area. It is important to note that if you are exporting to an image format like JPG, GeoTIFF, or ECW, the resultant image will still be rectangular. The areas outside the selected crop area will be filled in with the currently selected background color. You can change the background color under the View menu.
