Creating training samples

Available with Spatial Analyst license.

To create training samples, use the training sample drawing tools on the Image Classification toolbar.

The steps below show how to create training samples using the controls on the toolbar:
1. On the toolbar, choose an appropriate image layer in the Layer list.

   

2. Click the draw button. Notice that there is a choice of three drawing tools available, polygons, circles, and rectangles.

   

3. In the map display, identify an area that belongs to a known class. Use the drawing tool to define a training sample. The following image shows a polygon training sample:

   

4. Once you finish drawing the training sample, a new class is created in Training Sample Manager with a default name, value, and color. In the manager, change the class name, value, and color, if desired, for the class.
5. Repeat steps 2 to 4 to create a few more training samples to represent the rest of the classes on the image. The following illustrates what manager looks like after five classes were created: