hi,
analysing content of
/modules/plugin/epsg-wkt/src/main/resources/org/geotools/referencing/epsg/wkt/epsg.properties
i came across different towg84 definitions for DATUM "Amersfoort",
epsg:6289.
see attached text file for space formatted comparison.
basically "28992=PROJCS["Amersfoort / RD New""
has differences compared to rest (62896405, 4289, 28991, 7415 and 7408).
would anyone have an idea what is the story behind it?
cheers, niki
62896405=
GEOGCS["Amersfoort (deg)", DATUM["Amersfoort", SPHEROID["Bessel 1841",
6377397.155, 299.1528128, AUTHORITY["EPSG","7004"]], TOWGS84[565.2369, 50.0087,
465.658, -0.4068573303223975, -0.3507326765425626, 1.8703473836067956,
4.0812], AUTHORITY["EPSG","6289"]], PRIMEM["Greenwich", 0.0,
AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic
longitude", EAST], AXIS["Geodetic latitude", NORTH],
AUTHORITY["EPSG","62896405"]]
4289=
GEOGCS["Amersfoort", DATUM["Amersfoort", SPHEROID["Bessel 1841",
6377397.155, 299.1528128, AUTHORITY["EPSG","7004"]], TOWGS84[565.2369, 50.0087,
465.658, -0.4068573303223975, -0.3507326765425626, 1.8703473836067956,
4.0812], AUTHORITY["EPSG","6289"]], PRIMEM["Greenwich", 0.0,
AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic
longitude", EAST], AXIS["Geodetic latitude", NORTH], AUTHORITY["EPSG","4289"]]
28991= PROJCS["Amersfoort /
RD Old", GEOGCS["Amersfoort", DATUM["Amersfoort", SPHEROID["Bessel 1841",
6377397.155, 299.1528128, AUTHORITY["EPSG","7004"]], TOWGS84[565.2369, 50.0087,
465.658, -0.4068573303223975, -0.3507326765425626, 1.8703473836067956,
4.0812], AUTHORITY["EPSG","6289"]], PRIMEM["Greenwich", 0.0,
AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic
longitude", EAST], AXIS["Geodetic latitude", NORTH], AUTHORITY["EPSG","4289"]],
PROJECTION["Oblique_Stereographic", AUTHORITY["EPSG","9809"]],
PARAMETER["central_meridian", 5.387638888888891],
PARAMETER["latitude_of_origin", 52.15616055555556], PARAMETER["scale_factor",
0.9999079], PARAMETER["false_easting", 0.0], PARAMETER["false_northing",
0.0], UNIT["m", 1.0], AXIS["Easting", EAST], AXIS["Northing", NORTH],
AUTHORITY["EPSG","28991"]]
28992= PROJCS["Amersfoort /
RD New", GEOGCS["Amersfoort", DATUM["Amersfoort", SPHEROID["Bessel 1841",
6377397.155, 299.1528128, AUTHORITY["EPSG","7004"]], TOWGS84[565.417, 50.3319,
465.552, -0.398957, 0.343988, -1.8774,
4.0725], AUTHORITY["EPSG","6289"]], PRIMEM["Greenwich", 0.0,
AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic
longitude", EAST], AXIS["Geodetic latitude", NORTH], AUTHORITY["EPSG","4289"]],
PROJECTION["Oblique_Stereographic", AUTHORITY["EPSG","9809"]],
PARAMETER["central_meridian", 5.387638888888891],
PARAMETER["latitude_of_origin", 52.15616055555556], PARAMETER["scale_factor",
0.9999079], PARAMETER["false_easting", 155000.0], PARAMETER["false_northing",
463000.0], UNIT["m", 1.0], AXIS["Easting", EAST], AXIS["Northing", NORTH],
AUTHORITY["EPSG","28992"]]
7415= COMPD_CS["Amersfoort / RD New + NAP height", PROJCS["Amersfoort /
RD New", GEOGCS["Amersfoort", DATUM["Amersfoort", SPHEROID["Bessel 1841",
6377397.155, 299.1528128, AUTHORITY["EPSG","7004"]], TOWGS84[565.2369, 50.0087,
465.658, -0.4068573303223975, -0.3507326765425626, 1.8703473836067956,
4.0812], AUTHORITY["EPSG","6289"]], PRIMEM["Greenwich", 0.0,
AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic
longitude", EAST], AXIS["Geodetic latitude", NORTH], AUTHORITY["EPSG","4289"]],
PROJECTION["Oblique_Stereographic", AUTHORITY["EPSG","9809"]],
PARAMETER["central_meridian", 5.387638888888891],
PARAMETER["latitude_of_origin", 52.15616055555556], PARAMETER["scale_factor",
0.9999079], PARAMETER["false_easting", 155000.0], PARAMETER["false_northing",
463000.0], UNIT["m", 1.0], AXIS["Easting", EAST], AXIS["Northing", NORTH],
AUTHORITY["EPSG","28992"]], VERT_CS["NAP height", VERT_DATUM["Normaal
Amsterdams Peil", 2005, AUTHORITY["EPSG","5109"]], UNIT["m", 1.0],
AXIS["Gravity-related height", UP], AUTHORITY["EPSG","5709"]],
AUTHORITY["EPSG","7415"]]
7408= COMPD_CS["RD/NAP",
GEOGCS["Amersfoort", DATUM["Amersfoort", SPHEROID["Bessel 1841",
6377397.155, 299.1528128, AUTHORITY["EPSG","7004"]], TOWGS84[565.2369, 50.0087,
465.658, -0.40685733032239757, -0.3507326765425626, 1.8703473836067959,
0.8418079272556497], AUTHORITY["EPSG","6289"]], PRIMEM["Greenwich", 0.0,
AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic
longitude", EAST], AXIS["Geodetic latitude", NORTH], AUTHORITY["EPSG","4289"]],
VERT_CS["NAP height", VERT_DATUM["Normaal Amsterdams Peil", 2005,
AUTHORITY["EPSG","5109"]], UNIT["m", 1.0], AXIS["Gravity-related height", UP],
AUTHORITY["EPSG","5709"]], AUTHORITY["EPSG","7408"]]
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