THMRMER

Description

Creates a new thematic raster based on merging pixel values by attributes.

Parameters

Name	Type	Length	Value range
ThematicRaster: Input thematic raster channel *	Raster port	1 - 1
Output: Output thematic raster channel	Raster port	0 - 1
Adjacent/All Shapes	String	0 - 1	ADJACENT | ALL Default: ADJACENT
JoinAtDiagonal	String	0 - 1	YES | NO Default: YES
Attribute 1	String	0 - 1
Attribute 2	String	0 - 1
Attribute 3	String	0 - 1
Attribute 4	String	0 - 1
Attribute 5	String	0 - 1
Attribute 6	String	0 - 1
Attribute 7	String	0 - 1
Attribute 8	String	0 - 1
Attribute 9	String	0 - 1
Attribute 10	String	0 - 1
Report	String	0 - 192	See parameter description

* Required parameter

Parameter descriptions

ThematicRaster: Input thematic raster channel

Specifies the input channel that contains the input raster or thematic raster.

Output: Output thematic raster channel

Specifies the output channel to receive the generated thematic raster.

Adjacent/All Shapes

Specifies the method to use for merging shapes.

JoinAtDiagonal

Specifies whether to join polygons at diagonals.

Attribute 1

Specifies the first of 10 possible attributes to use for merging.

Attribute 2

Specifies the second of 10 possible attributes to use for merging.

Attribute 3

Specifies the third of 10 possible attributes to use for merging.

Attribute 4

Specifies the fourth of 10 possible attributes to use for merging.

Attribute 5

Specifies the fifth of 10 possible attributes to use for merging.

Attribute 6

Specifies the sixth of 10 possible attributes to use for merging.

Attribute 7

Specifies the seventh of 10 possible attributes to use for merging.

Attribute 8

Specifies the eighth of 10 possible attributes to use for merging.

Attribute 9

Specifies the ninth of 10 possible attributes to use for merging.

Attribute 10

Specifies the tenth of 10 possible attributes to use for merging.

Report

Specifies where to direct the generated report.

Available options are:

• LOG: generates a report on the terminal (default)
• <modulename.RPT>: appends a report to the module's RPT file
• DISK: generates a report on file "IMPRPT.LST"

Details

THMRMER merges classes within a thematic raster to create a new thematic raster with aggregated classes. The classes to be merged are based on the attribute(s) specified. For two classes to be merged, the value within the specified attribute(s) must be the same for those two classes. The location of the pixels that form the classes can also be taken into account, if desired. You can specify that only adjacent (neighboring) pixels are to be merged, or that all of the classes that are attribute matches should be merged.

For example, suppose you have detailed data at the county level for a whole country, but are only interested in information at the state/provincial level. If the county data has an attribute indicating the state/province to which it belongs, you can use THMRMER to aggregate the county classes together to a state/provincial level.

If you want more control over the attributes that you want in the output thematic raster, you can use the Dissolve tool in CATALYST Professional Focus.