CDDMC

Description

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

Parameters

Name	Type	Caption	Length	Value range
FILI*	String	Input file name	1 - 192
FILO*	String	Output file name	1 - 192
LINKFILE	String	Create linked file	0 - 3	YES, NO Default: NO
CDIC*	Integer	CD Input channels or layers	1 - 6
TEX1	String	Descriptive text	0 - 192
REPORT	String	Report mode	0 - 192	Quick links
MONITOR	String	Monitor mode	0 - 3	ON, OFF Default: ON

* Required parameter

Parameter descriptions

FILI

Specifies the name of the input TIFF file.

FILO

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

LINKFILE

Instead of creating a new PCIDSK FILO to read the data from FILI, this parameter will create an output file in which the image channel is linked to the original imagery channel. The orbital segment will still be created in FILO. The default value is NO.

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

CDIC

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.

Ranges of channels or segments can be specified with negative values. For example, {1,-4,10} is internally expanded to {1,2,3,4,10}. When you are not specifying a range in this way, only 48 numbers can be specified explicitly.

TEX1

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:

• TERM: generates a report on the terminal (default)
• DISK: generates a report on file "IMPRPT.LST"
• OFF: turns off report generation
• <filename>: appends a report to the specified file

MONITOR

The program progress can be monitored by printing the percentage of processing completed. A system parameter, MONITOR, controls this activity.

Available options are:

• ON: Turns the monitor ON (default)
• OFF: Turns the monitor OFF (recommended if running in batch or background mode)

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.

If LINKFILE is set to NO, the output file is automatically created with the dimensions required to hold all of the requested data. Ensure that sufficient disk space is available before running CDDMC. If LINKFILE is set to YES, the image channel is not created; instead, it is linked to the image channel of FILI.

Example

The user has received a DMC product in GeoTiff CD format and wishes to perform orthorectification on the data. The user first extracts channel 1 and stores the data in the file dmc.pix.

EASI>FILI/cdrom/DMC_2_CCD1XS_20040616_156_119_BAND2.tif"
EASI>FILO="dmc.pix"
EASI>LINKFILE="NO"
EASI>CDIC=1
EASI>TEX1="Richmond Hill, Canada"
EASI>REPORT="dmc.txt"

EASI>R CDDMC

The file dmc.pix, along with collected Ground Control Points, can now be used as input for OrthoEngine.

Acknowledgements

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

References

Toutin, Th. "Analyse math\u00c3\u00a9matique des possibilit\u00c3\u00a9s cartographiques du syst\u00c3\u00a8me SPOT". Th\u00c3\u00a8se de Docteur-Ing\u00c3\u00a9nieur en Sciences G\u00c3\u00a9od\u00c3\u00a9siques, ENSG, Paris, France, 1985: 1-163.

Toutin, Th. and Carbonneau Y. "La multi-st\u00c3\u00a9r\u00c3\u00a9oscopie 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).