ORTHOSAR2

Description

Uses different geometric models to orthorectify images.

Parameters

Name	Type	Caption	Length	Value range
FILI *	String	Input file name	1 - 192
DBIC	Integer	Input raster channel(s)	0 -
OUTBGD	Float	Output background	0 - 1	Default: 0
FILEDEM	String	File or directory containing the digital elevation model	0 - 192
FILO	String	Output file or directory	0 - 192

* Required parameter

Parameter descriptions

FILI

Input scene in a SAR geometry to be orthorectified

DBIC

Specifies the channel(s) in the input file to be processed.

If this parameter is not specified, all channels in the source file will be processed.

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.

OUTBGD

Specifies the background (NoData) value to use for ortho pixels that are not populated. All channels are set to the same background value. The provided background value will be truncated to the range allowed by the source image data type.

FILEDEM

Optionally specifies the name of a file or directory containing DEM tiles.

If FILEDEM is the name of a single file, the parameters DBEC, BACKELEV, ELEVREF, ELEVUNIT and ELFACTOR are used, if provided.

If FILEDEM is an empty string, the offset component of ELFACTOR and the ELEVREF parameter are used to define the height surface for orthorectification. Note that if ELEVREF is Mean Sea Level (MSL), this constant elevation is treated as a Mean Sea Level height and may be converted to an ellipsoidal height before use.

If FILEDEM is the name of an existing directory, this directory is searched for a file named index.txt, as well as a set of DEM raster tiles. The index.txt file contains information describing the raster tiles. The format of index.txt and specific requirements for the individual DEM tiles are described in the Details section.

FILO

Specifies the name of the output file or directory to receive the processed files, depending on the value of MFILE.

If MFILE is the name of a single file, this parameter specifies the name of the new orthorectified file to create. If FILO is an empty string, the output file will have the same name as the input file, prefixed with an "o".

If MFILE represents multiple files, this parameter specifies the name of the output directory where the new files will be created. Each output file will have the same name as its corresponding input file, prefixed with an "o". If FILO is an empty string, the output files will be generated in the current working directory.

Details

Example

EASI>fili="rawAirphoto.pix"
EASI>dbic=3,2,1 
EASI>filo = "oAirphoto_trim512_ch321_EASI.pix" 
EASI>outbgd=0 
EASI>filedem = "dem.pix" 

EASI>r orthosar2