Masking an image area

The masked area combines classes. You can select a region over the entire file to combine all of the classes in the image.

Masking an image area is similar to creating a training site. You can mask over a part of the image.

  1. In the Maps tree, select the new bitmap layer below the Classification MetaLayer.
  2. On the Editing toolbar, click the New Shapes arrow and choose Polygon.
  3. In the view pane, draw a mask over the part of the image you want to edit.
  4. In the Class Editing window, select a class in the Source Classes area. If you want to select all classes, click Select All.
  5. Click the Merge Classes.
  6. In the View Controls area of the Class Editing window, disable the Mask visible check box.

    If you want to use more than one mask to cover all of the image areas you want to edit, repeat the procedure.

Parent topic: Post-classification editing
Previous topic: Saving a bitmap mask

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