Hello Michael
Le 29/01/2020 à 21:21, Michael Arneson a écrit :
I have a WKT that represents a GEOGTRAN transformation. This WKT is
(…snip…):
Does Apache SIS support GEOGTRAN transformations?
I do not remember to have seen GEOGTRAN before… I do not see it in WKT 2
specification [1]. Maybe it is an extension of some software? The other
keywords (GEOGCS, SPHEROID, etc.) are legacy WKT 1 keywords, which did
not had coordinate operation support.
Can you reformat the definition as WKT 2 in the way described by [1]?
For the WKT you provided something like the following should work (I did
not tested):
COORDINATEOPERATION["PSAD_1956_To_WGS_1984_9"],
SOURCECRS[
GEODCRS["GCS_Provisional_S_American_1956",
DATUM["D_Provisional_S_American_1956",
ELLIPSOID["International_1924",6378388.0,297.0]],
CS[ellipsoidal,2],
AXIS["longitude",east],
AXIS["latitude",north],
ANGLEUNIT[“degree”,0.0174532925199433]]],
TARGETCRS[
GEODCRS["GCS_WGS_1984",
DATUM["D_WGS_1984",
ELLIPSOID["WGS_1984",6378137.0,298.257223563]],
CS[ellipsoidal,2],
AXIS["longitude",east],
AXIS["latitude",north],
ANGLEUNIT[“degree”,0.0174532925199433]]],
METHOD[“Geocentric translations”,ID[“EPSG”,1031]],
METHOD["Geocentric_Translation"]
PARAMETER["X_Axis_Translation",-295.0]
PARAMETER["Y_Axis_Translation",173.0]
PARAMETER["Z_Axis_Translation",-371.0],
ID["EPSG",1209]]
Martin
[1] http://docs.opengeospatial.org/is/18-010r7/18-010r7.html
