In the Thematic Layers field, specify the thematic layers to be considered in addition to
segmentation. Each thematic layer used for segmentation will cause additional splitting
of image objects while enabling consistent access to its thematic information. You can
segment an image using more than one thematic layer. The results are image objects rep-
resenting proper intersections between the thematic layers. If you want to produce image
objects based exclusively on thematic layer information, you can select a chessboard size
larger than your image size between the thematic layers.