The Raster to Polygons operation extracts polygons from units in a raster map. The output polygon map uses the same domain as the input raster map, i.e. the class names or IDs in the input raster map will also be used for the polygons in the output polygon map. No polygons are created for pixels with the undefined value.
Dialog box options:
Input raster map: |
Select an input raster map (map with a class, ID, Bool or Group domain). Open the list box and select the desired input map, or drag a raster map directly from the Catalog into this box. The raster map must have a georeference which is not georeference None. |
Connect: |
Specify to obtain polygons from 4-connected pixels or from 8-connected pixels. |
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Find areas of pixels with the same value/name which are horizontally or vertically connected, then create polygons from these areas. |
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Find areas of pixels with the same value/name which are horizontally, vertically or diagonally connected, then create polygons from these areas. |
Smooth lines: |
Select this check box if you want the boundaries of the output polygons to be smoothed. Clear this check box if the polygon boundaries should follow the exact boundaries of the pixel areas. |
Output polygon map: |
Type a name for the output polygon map that will contain the polygons extracted from units in the raster map. |
Description: |
Optionally, type a description for the output map. The description will appear in the status bar of the Main window when moving the mouse pointer over the map in a Catalog, and in the title bar of a map window when the output map is displayed. If no description is supplied, the output map will use its own definition as description. |
When you click the Show button, the dependent output map will be defined, calculated and shown. When you click the Define button, the dependent output map will only be defined; if necessary, the map will be calculated later, for instance when the map is opened to be displayed.
See also: