[Geotools-gt2-users] Transformation question

[Martin S. <gt...@mo...>]

Hello again,

I use GT 2.3.1 and have problems to transformate the following CRS to WGS8=
4 (and vice versa). I got the CRS definition from my customer, who created=
 it especially for his investigation area in Morocco:

PROJCS["Lambert=5FIMPETUS=5FMarokko",
  GEOGCS["GCS=5FMerchich=5FDegree",
    DATUM["D=5FMerchich",SPHEROID["Clarke=5F1880=5FIGN",6378249.2,293.46602]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]
  ],
  PROJECTION["Lambert=5FConformal=5FConic"],
  PARAMETER["False=5FEasting",500000.0],
  PARAMETER["False=5FNorthing",300000.0],
  PARAMETER["Central=5FMeridian",-5.4],
  PARAMETER["Standard=5FParallel=5F1",31.7239256472],
  PARAMETER["Standard=5FParallel=5F2",34.8664576558],
  PARAMETER["Scale=5FFactor",1.0],
  PARAMETER["Latitude=5FOf=5FOrigin",33.3],
  UNIT["Meter",1.0]
]

The instantiation of the CoordinateReferenceSystem 'moroccoCRS' by CRS.dec=
ode(crsString, true) succeeds.

But creating the transformation by CRS.findMathTransform(DefaultGeographic=
CRS.WGS84, moroccoCRS) leads to an exception with "Bursa wolf parameters r=
equired" message. Using CRS.findMathTransform(DefaultGeographicCRS.WGS84, =
moroccoCRS, true) causes no exception, but the transformation seems not to=
 work well, certainly because the lenient-parameter (TRUE) instructs findM=
athTransform(..) to ignore any datum shift.

My main problem is, that I don't know, what "Bursa wolf parameters" are fo=
r, and how to set them...

Thanks for help.

Martin Schmitz

=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=

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