AVMODEL

Description

AVMODEL uses AVHRR data to calculate the mathematical models required for orthorectification.

Parameters

Name	Type	Length	Value range
InputGCP: Input GCP segment or layer	GCP port	0 - 1	1 -
InputOrbit: Orbit segment or layer	ORB port	0 - 1	1 -
OutputMM: Output math model segment or layer	Raster port	0 - 1	1 -
Report	String	0 - 192	See parameter description

Parameter descriptions

InputGCP: Input GCP segment or layer

Specifies the ground control point (GCP) segment or layer number in the input raw image to be processed.

InputOrbit: Orbit segment or layer

Specifies the input orbit segment or layer to use to compute the model.

OutputMM: Output math model segment or layer

Specifies the geomateric math model segment or layer in which to store the model.

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

AVMODEL calculates the mathematical model required for orthorectification using AVHRR data. Only PCIDSK files with ORBIT and ground control point (GCP) segments are supported

The MMSEG (OutputMM) value is interpreted as the number of a GCP segment or layer that exists or is to be created in the file. The MMSEG value must be 1 or the greatest existing math model segment number plus 1.

If any of the input image files are not PCIDSK files, a PCIDSK file that links to the input image file is created to hold the computed math model for the image. The PCIDSK file will have the same path and file name as the image model, but with a ".pix" extension.