Available with Spatial Analyst license.
Tool parameters define how a tool processes input data. Tool parameters are composed of keywords, values, and classes.
Tool parameter rules
The following are tool parameter rules.
Parameter keywords
A keyword parameter such as output_measurement has specific preset keywords (DEGREE, PERCENT_RISE), which are enclosed in quotation marks. Keywords are not case sensitive, but it is recommended that you capitalize them for readability.
# Usage: Slope(in_raster, {output_measurement}, {z_factor})
# DEGREE will be used as the default output measurement in the
# following statement
outRas = Slope("elevation", "DEGREE")Numerical values
Parameters that are numerical values are typically not in quotation marks.
# In the following statement, 4 is the zfactor parameter value
outRas = Slope("inraster", "DEGREE", 4)Classes
Some input parameters are classes. Classes are used when geoprocessing tool parameters would otherwise be a more complicated string equivalent.
The specific arguments for the class are enclosed in parentheses. String input is in quotation marks, and numbers are not; parameters are comma delimited.
outRas = FocalStatistics("inraster", NbrAnnulus(1, 3, "MAP"), "VARIETY")For additional information, see Spatial Analyst classes.
Default value for an optional parameter
To specify a default value for an optional parameter, you must use empty quotation marks.
# In the following statement the slope calculations will
# default to DEGREE; 4 is the z value
outRas = Slope("inraster", "", 4)