# [Proj] Netherlands RD (28992) to UTM Zone 32 (3044) produces shifted coordinates

Jelmer Baas baas at speerit.nl
Tue Jul 30 03:49:35 EST 2013

```Hello,

For a new project we need to convert coordinates from EPSG 28992 to EPSG 3044 with MapInfo, Oracle AND a few Proj.4 programs (PostGIS, a custom DLL, Proj4js). The problem we are having is that we're seeing some shifted coordinates.

First test point (in the Netherlands)

Origin               135745.924           517131.216

Proj4js              236345.39474983042   5839505.550959114

Postgis(1)           236345.390264227     5839505.55017783

Postgis(2)           236345.394817119     5839505.55055913

MapInfo              236345.47            5839504.058

CS2CSN               236345.39            5839505.55

DLL old(4)            236345.396465174     5839505.54496813

DLL new(3)           236345.390259674     5839505.55009311

Oracle               236345.49107424      5839504.12246656

Test point (in Germany)

Origin              254870.45            415123.56

MapInfo             350265.960           5731670.259

Postgis(1)          350263.4072329       5731667.880

Postgis(2)           350263.4132521       5731667.880

DLL new(3)           350263.407243136     5731667.88019826

DLL old(4)           350263.403514925     5731667.88565864

Oracle(5)           350265.967728329     5731670.33312477

CS2CS                350263.41            5731667.88 43.92     cs2cs +init=EPSG:28992 +to +init=EPSG:3044

It seems MapInfo and Oracle more-or-less agree, as do all Proj.4-based products. I don't know which are "right", meaning I also don't know which ones are wrong - let alone find the fault.

Hopefully someone can help me with this problem, or at least point me in the right direction.

(1): "+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel +towgs84=565.417,50.3319,465.552,-0.398957,0.343988,-1.8774,4.0725 +units=m +no_defs "

(2) Another server where I updated the spatial_ref_system: "+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel +units=m +towgs84=565.2369,50.0087,465.658,-0.406857330322398,0.350732676542563,-1.8703473836068,4.0812 +no_defs no_defs"

(3) A custom built DLL for usage in VB6. "+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.999908 +x_0=155000 +y_0=463000 +ellps=bessel +units=m +towgs84=565.2369,50.0087,465.658,-0.406857330322398,0.350732676542563,-1.8703473836068,4.0812 +no_defs <>"

(4) Same DLL. "+proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel +towgs84=565.417,50.3319,465.552,-0.398957,0.343988,-1.8774,4.0725 +units=m +no_defs  <>"

(5) select sdo_cs.transform(SDO_GEOMETRY('POINT(254870.45 415123.56)', 90112),25832)  from dual;

(5b) The Oracle definition contains some  tags I don't see anywhere in Proj.4 (like the Bessel 1841 part):

PROJCS["Netherlands National System", GEOGCS [ "Netherlands Bessel", DATUM ["Netherlands Bessel", SPHEROID ["Bessel 1841", 6377397.155, 299.1528128]], PRIMEM [ "Greenwich", 0.000000 ], UNIT ["Decimal Degree", 0.01745329251994330]], PROJECTION ["Stereographic"], PARAMETER ["Scale_Factor", 0.999908], PARAMETER ["Central_Meridian", 5.387639], PARAMETER ["Latitude_Of_Origin", 52.156161], PARAMETER ["False_Easting", 155000.000000], PARAMETER ["False_Northing", 463000.000000], UNIT ["Meter", 1.000000000000]]

A side note is that transformation via my DLL doesn't work properly (i.e., coordinates are shifted tens of meters), unless I *first* transform to WGS84 and then to 3044. I assume this is caused by an easy-to-fix error, but I don't know what that is.

P.S.: PostGIS, Proj4JS and my epsg file are all up-to-date.

Thanks for any help,

With kind regards,

Jelmer Baas

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