CDDMC

Description

CDDMC reads DMC imagery from TIFF format CD data for orthorectification.

Parameters

Name	Type	Length	Value range
TIFF file name *	String	1 -
Output: Output file name *	Raster port	1 -
Create linked file	String	0 - 1	YES, NO Default: NO
OutputOrbit: Output satellite orbital ephemeris layer *	ORB port	1 - 1
CD input layer(s) list *	Integer	1 - 6
File description	String	0 -
Report	String	0 - 192	See parameter description

* Required parameter

Parameter descriptions

TIFF file name

Specifies the name of the input TIFF file.

Output: Output file name

Specifies the name of the PCIDSK file that will receive the processed data. This file will be created automatically and must not already exist.

Create linked file

LinkFile is a hidden parameter with a value of YES.

All output layers will be linked to the original image file.

OutputOrbit: Output satellite orbital ephemeris layer

Specifies the output satellite orbital ephemeris layer(s) that will receive the orbital information.

CD input layer(s) list

Specifies the list of channels or layers to read from the CD. Up to 6 channels may be specified.

For each channel, a corresponding channel is created in the output PCIDSK file. Duplicate channels are not allowed.

If this parameter is not specified, all channels will be read from the file.

File description

Optionally specifies a line of text that describes the file. Typically, this contains information that identifies the location of the data and the CD reference number.

If TEX1 (File Description) is not specified, the File Header fields in the generated output PCIDSK image database hold the following information:

• FH5 receives the tape ID, satellite sensor, and satellite track
• FH7.1 receives the acquisition date and scene center (longitude and latitude, in decimal degrees)
• FH7.2 is empty

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

CCDDMC reads DMC TIFF file format data from CD when satellite orthorectification is required. CDDMC automatically creates a PCIDSK file, reads all the requested imagery channels from CD, and saves the satellite path information in a segment. The corresponding metadata (.dim) file must exist in the same directory as the imagery file. Output from CDDMC is used in CATALYST Professional OrthoEngine.

CDDMC extracts from the CD the geographic coordinates of the scene center and the four corner points. The values are stored in the output orbit segment. These points can be used as ground control point (GCP) input for an approximate correction, which is useful when GCPs are unavailable for an area. Note, however, that using geographic coordinates may not produce very accurate results.

The OutputOrbit port receives the orbit layer that contains the orbital information.

Acknowledgements

PCI Geomatics wishes to acknowledge the assistance of Dr. Thierry Toutin for this software.

References

Toutin, Th. "Analyse mathématique des possibilités cartographiques du système SPOT". Thèse de Docteur-Ingénieur en Sciences Géodésiques, ENSG, Paris, France, 1985: 1-163.

Toutin, Th. and Carbonneau Y. "La multi-stéréoscopie pour les corrections d'images SPOT-HRV", Canadian Journal of Remote Sensing, p110, Vol. 15, No. 2 (September 1989): 110. (Also available in English from the Canada Centre for Remote Sensing.)

Product format specification: Crowley, Gary. "DMC Data Product Manual", Document 0115056 Issue 2, February 2010, DMC International Imaging Ltd (Available from ESA).