The Point Density operation rasterizes a point map. For each output pixel, the number of points with a class name, ID or value located in the output pixel is counted: this is the output value for the pixel. When using the command line, you can also sum the values of points (or of point attributes). This operation can be used to examine the regional distribution of points or point values.
Dialog box options:
Input point map: |
Select an input point map. Open the list box and select the desired input map, or drag a map directly from the Catalog into this box. No special input map requirements. |
Point size: |
Type a value (integer > 0) for the size of the points in pixels in the output map. Point size 1 means each point is counted in 1 pixel in the output map. Point size 2 means that each point is counted in 2 x 2 pixels in the output map. |
Output raster map: |
Type a name for the output raster map that will contain the counted number of points found in each output pixel. |
Georeference: |
Select an existing georeference or create |
Domain: |
Accept the default domain Count, or select an existing value domain, or create a new value domain. |
Value range: |
Accept the default value range for the output map, or specify the value range yourself. |
Precision: |
Accept the default precision for the output map, or specify the precision yourself. |
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: