I am seeing an image clipping problem in Geoserver during re-projection of
whole-world geotiffs from epsg:4326 to a custom pacific centered projection
that I've tracked down to this method:
org.geotools.referencing.CRS.transform(CoordinateOperation, Envelope)
not returning the correctly re-projected envelope when called by
org.geotools.coverage.processing.operation.Resampler2D.reproject() during
GetMap processing.
The envelope is whole-world, so I would expect (-180,-90),(180,90) to be
re-projected to approximately (-2E7,-1E7), (2E7,1E7) which is whole-world
centered on 150 longitude. But instead it is transformed to
[(-1.6697923618991036E7, -1.0074413916791257E7), (1.3330509022494508E7,
1.0074413916791257E7)]
which is approximately 0 degrees longitude to -90 longitude (crossing the
anti-meridian). So the envelope is clipped on the left by about 30 degrees and
on the right by about 60 degrees. Is this a bug? Can anyone shed some light
on this behavior?
I am using geoserver 2.7.2/Geotools 13.2 but CRS.transform(CoordinateOperation,
Envelope) looks identical on the master. My custom projection is defined by
the following WKT:
PROJCS["Pacific World Equidistant Cylindrical",\
GEOGCS["WGS 84",\
DATUM["World Geodetic System 1984",\
SPHEROID["WGS 84",6378137,298.257223563,\
AUTHORITY["EPSG","7030"]], \
AUTHORITY["EPSG","6326"]],\
PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],\
UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9108"]],\
AXIS["Geodetic longitude", EAST], \
AXIS["Geodetic latitude", NORTH], \
AUTHORITY["EPSG","4326"]], \
PROJECTION["Equidistant_Cylindrical", AUTHORITY["EPSG","1028"]],\
PARAMETER["central_meridian",150],\
PARAMETER["latitude_of_origin",0],\
PARAMETER["standard_parallel_1",0],\
PARAMETER["false_easting",0],\
PARAMETER["false_northing",0],\
UNIT["m",1.0], \
AXIS["Easting", EAST], \
AXIS["Northing", NORTH],\
AUTHORITY["EPSG","904326"]]
Thanks for any insight you can provide,
Tom Ruff
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