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<< Click to Display Table of Contents >> Basic Module -Intensity Processing - Geocoding - Shape Conversion Map to Slant Range |
  
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<< Click to Display Table of Contents >> Basic Module -Intensity Processing - Geocoding - Shape Conversion Map to Slant Range |
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Purpose
This functionality is aimed at transforming a geocoded shape file (.shp) into a slant or ground range input SAR image.
Technical Note
In case of precise orbits and accurately geocoded shape file, this process is run in a fully automatic way. However, in case of inaccuracy in the satellite orbits or in the geocoded shape file, a Ground Control Point is required to correct the SAR data (i.e. "Reference file") with respect to the input shape file. The Ground Control Point must be identified on the "Slant/Ground range file". The GCP is not needed if the manual or the automatic correction procedure has been previously executed.
In case the height information is provided both by the "Input file" and by the Digital Elevation Model, the shape (i.e. "Input file") values will be used for the co-ordinates conversion.
Input Files
Input file
File name of the shape file (.shp) in a supported cartographic reference system. This file is mandatory.
Input Reference file
File name of the slant or ground range SAR data, onto which the geocoded shape file shall be converted. This file is mandatory.
Optional Files
Geometry GCP File
Either a previously created Ground Control Point file (.xml) is loaded (Load GCP file) or The interface to create a new Ground Control Point file is automatically loaded (Create GCP file, refer to the "Tools>Generate Ground Control Point" for details). This file is optional.
DEM/Cartographic system
Digital Elevation Model file
Digital Elevation Model file name. This should be referred to the ellipsoid. This file is optional.
Output Projection
In case that the Digital Elevation Model is not used, the following parameters are compulsory to define the Cartographic System:
State
Definition of the country or general projection systems.
Projection
Definition of the projection system of the selected State. In case that a general projection system is selected in State, the Projection is automatically set.
Ellipsoid
Definition of the ellipsoid. This is chosen according to the selected State and Projection.
Hemisphere
Definition of the hemisphere. This is chosen according to the selected State and Projection.
Zone
Definition of the zone. This is chosen according to the selected State and Projection.
Datum Shift Parameters
Definition of the datum shift parameters. These are chosen according to the selected State and Projection.
In case that the Digital Elevation Model is not used, a constant ellipsoidal height must be provided. Default Reference Height is 0.
Cartographic Parameters
The reference parameters for some projection systems (e.g. Stereographic, Polar Stereographic, Gnomonic, Mercator, Miller, Albers, etc.) can be set.
Output Files
Output file
Output file name of the slant or ground range projected data. This file is mandatory.
_slant.shp
Shape file in slant or ground range SAR geometry.
Details specific to the Units of Measure and Nomenclature of the output products can be found in the Data Format section.
General Functions
Exec
The processing step is executed.
Store Batch
The processing step is stored in the batch list. The Batch Browser button allows to load the batch processing list.
Close
The window will be closed.
Help
Specific help document section.
Specific Function(s)
None.
Task, SARscapeBatch object, SARscapeBatch script example
References Frei U., C. Graf, and E. Meier: "Cartographic Reference Systems, SAR Geocoding". Data and System, Wichmann Verlag, 1993. Meier E., Frei U., and D. Nuesch: "Precise Terrain Corrected Geocoded Images, SAR Geocoding". Data and System, Wichmann Verlag, 1993.