Showing posts with label map. Show all posts
Showing posts with label map. Show all posts
Thursday, February 12, 2015
Fixing a Map Projection Issue for the Next SAR Toolbox
In the Nest Sar Toolbox you have a choice of coordinate systems:
For some of these, however, Nest reports the error "Axis Too Complex".
I compared a map projection that works with one where “Axis too complex” error is reported. Map projections that work contain these lines:
While the non-working ones contain these lines, which apparently are wrong or unprocessable by NEST
If you use the graph builder or command line (gpt) where the parametres are defined in an XML-file, you can manually replace these lines in the graph file (xml file) for the projection definition, then it works! An example for such an XML-file used by NEST is here.
Another example, this one works
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I compared a map projection that works with one where “Axis too complex” error is reported. Map projections that work contain these lines:
AXIS["Easting", EAST],
AXIS["Northing", NORTH]
While the non-working ones contain these lines, which apparently are wrong or unprocessable by NEST
AXIS["Easting", "North along 90 deg East"],
AXIS["Northing", "North along 0 deg"],
If you use the graph builder or command line (gpt) where the parametres are defined in an XML-file, you can manually replace these lines in the graph file (xml file) for the projection definition, then it works! An example for such an XML-file used by NEST is here.
Another example, this one works
PROJCS["WGS 84 / Australian Antarctic Lambert",EPSG3031 works not:
GEOGCS["WGS 84",
DATUM["World Geodetic System 1984",
SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
UNIT["degree", 0.017453292519943295],
AXIS["Geodetic longitude", EAST],
AXIS["Geodetic latitude", NORTH],
AUTHORITY["EPSG","4326"]],
PROJECTION["Lambert_Conformal_Conic_2SP", AUTHORITY["EPSG","9802"]],
PARAMETER["central_meridian", 70.0],
PARAMETER["latitude_of_origin", -50.0],
PARAMETER["standard_parallel_1", -68.5],
PARAMETER["false_easting", 6000000.0],
PARAMETER["false_northing", 6000000.0],
PARAMETER["scale_factor", 1.0],
PARAMETER["standard_parallel_2", -74.5],
UNIT["m", 1.0],
AXIS["Easting", EAST],
AXIS["Northing", NORTH],
AUTHORITY["EPSG","3033"]]
PROJCS["WGS 84 / Antarctic Polar Stereographic",
GEOGCS["WGS 84",
DATUM["World Geodetic System 1984",
SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
UNIT["degree", 0.017453292519943295],
AXIS["Geodetic longitude", EAST],
AXIS["Geodetic latitude", NORTH],
AUTHORITY["EPSG","4326"]],
PROJECTION["Polar Stereographic (variant B)", AUTHORITY["EPSG","9829"]],
PARAMETER["central_meridian", 0.0],
PARAMETER["Standard_Parallel_1", -71.0],
PARAMETER["false_easting", 0.0],
PARAMETER["false_northing", 0.0],
UNIT["m", 1.0],
AXIS["Easting", "North along 90 deg East"],
AXIS["Northing", "North along 0 deg"],
AUTHORITY["EPSG","3031"]]
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