RPyGeo (version 0.9-3)

ArcGIS Map Algebra: Wrapper for the Map Algebra tool

Description

Wrappers for the Single Output Map Algebra tool of the Spatial Analyst extension.

Usage

rpygeo.SingleOutputMapAlgebra.sa(expression.string, out.raster,  in.data = NULL, ...)

Arguments

in.data, out.raster

Names of ArcGIS raster or vector datasets or feature classes in a geodatabase (relative to the current workspace defined in a rpygeo.env environment). Shapefiles must include the extension ".shp".

expression.string

Valid Map Algebra expression as described in the ArcGIS help files (link below).

...

Additional arguments to be passed to rpygeo.geoprocessor.

Value

The functions return NULL if no error occurred, otherwise a character vector containing the error message.

Details

These functions simply interface the behaviour of the ArcGIS/Python geoprocessing functions with the equivalent names. See rpygeo.geoprocessor for details on what happens behind the scenes.

ArcGIS 9.2 online help for the georpocessing tools can be accessed through the following URLs:

• SingleOutputMapAlgebrahttp://webhelp.esri.com/arcgisdesktop/9.2/index.cfm?TopicName=Single_Output_Map_Algebra

See Also

rpygeo.geoprocessor, rpygeo.build.env