To create a Thiessen map, one of the following expressions can be typed on the command line of the Main window:
|
OUTDist |
= |
MapDistance(SourceMap, WeightMap, OutThies) |
|
OUTDist |
= |
MapDistance(SourceMap, 1, OutThies) |
|
OUTDist |
= |
MapDistance(SourceMap, , OutThies) |
|
OUTThies |
= |
MapThiessen(SourceMap, OutDist) |
|
OUTThies |
= |
MapThiessen(SourceMap, WeightMap, OutDist) |
|
OUTThies |
= |
MapThiessen(SourceMap, 1, OutDist) |
|
OUTThies |
= |
MapThiessen(SourceMap, , OutDist) |
where:
|
OUTDist |
is the name of your output raster distance map. |
|
OUTThies |
is the name of your output raster Thiessen map. |
|
MapDistance |
is the command to start the Distance calculation operation. In the expressions above, also a Thiessen map is calculated. |
|
MapThiessen |
is the command to start the calculation of a Thiessen map. When calculating a Thiessen map, also a distance map is calculated. |
|
SourceMap |
is the name of the source map; the source map can be a map with a class, ID, or value domain. |
|
WeightMap |
is the name of the optional weight map; the weight map should be a map with a value domain. |
When the definition symbol = is used, a dependent output map is created; when the assignment symbol := is used, the dependency links are immediately broken after the output maps have been calculated.
See also: