THMROVR

Description

Takes two or more thematic rasters, overlays them, and produces a new output thematic raster.

Parameters

Name	Type	Length	Value range
Input: Input raster channels *	Raster port	2 - 1024
Bitmap: Input bitmap mask segment	Bitmap port	0 - 1
Output: Output thematic raster channel	Raster port	0 - 1
Combine How?	String	0 - 1	UNION \| INTERSECTION Default: UNION
Report	String	0 - 192	See parameter description

* Required parameter

Parameter descriptions

Input: Input raster channels

Specifies the channels of thematic raster data to combine. At least two input raster channels must be specified.

All input thematic rasters must have the same projection/datum and pixel size.

Bitmap: Input bitmap mask segment

Specifies the segment that contains the input area mask, which indicates the area to process. Only the area under the bitmap will be processed. The bitmap must have the same projection/datum and pixel size as the input thematic rasters.

Output: Output thematic raster channel

Specifies the channel to receive the output thematic raster, which is a combination of all of the input channels.

Combine How?

Specifies the method to use for the overlay processing.

Available options are:

UNION: union of input data. Overlays all the shapes from all the input channels. This is the default value
INTERSECTION: intersection of input data. Restricts the overlay to the common areas shared by all the shapes of the input channels.

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

THMROVR overlays data from input thematic raster layers. Available combination methods include:

Union of input data: overlays all the shapes from all the input channels
Intersection of input data: restricts the overlay to the common areas shared by all the shapes of the input channels

For example, if you overlay a shape on an area of 'No_Data', the UNION option will output the shape while the INTERSECTION option will not because 'No_Data'is not a valid shape and there is no intersection of shapes.

All the attributes from all the input channels are passed to the resulting thematic raster. The function appends an underscore 1, 2, etc. to each channel's attributes, ensuring that each input channel's attributes remains unique in the output. For example:

input channel 1 has attributes user1, user2
input channel 2 has attributes user1, user2
resulting thematic raster attributes would have user1_1, user2_1, user1_2 and user2_2

The output thematic raster gets a new area calculated for the new resultant overlay.

Environments	PYTHON :: EASI :: MODELER
Batch Mode	Yes
Quick links	Description :: Parameters :: Parameter descriptions :: Details

THMROVR

Overlay thematic raster channels

Description

Parameters

Parameter descriptions

Details