FW: [UMN_MAPSERVER-USERS] Projection problem Mapserver/Geoserver/Geotools

[Wim Blanken]

Hello Gerry,

Thanx for your help.
I am now using the 1.5 version of Geoserver and the projection is good in
that version. I heard that it uses a more recent library of EPSG than 1.4 so
I think the problem is already solved in the EPSG library itself.

With Regards,

Wim Blanken

-----Oorspronkelijk bericht-----
Van: Gerry Creager [mailto:gerry.creager at tamu.edu] 
Verzonden: dinsdag 13 februari 2007 15:19
Aan: Wim Blanken
Onderwerp: Re: [UMN_MAPSERVER-USERS] Projection problem
Mapserver/Geoserver/Geotools

Wim,
Mime-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset=windows-1252; format=flowed

If you can provide some more detail on the EPSG error, I can get the=20
info fed back into EPSG for rectification.

gerry

Wim Blanken wrote:
> Hello List,
>=20
> =20
>=20
> Maybe a bit off topic but I cannot choose one simple list for this one=85=
..
>=20
> =20
>=20
> The following projection problem. In the Netherlands we have a=20
> projection system that is based on double_stereographic (sterea).
>=20
> In the proj list there was a flaw with the settings for the EPSG:28992=20
> code. I did not see it until I played around with google earth in=20
> combination with mapservices.
>=20
> The alignment is wrong (about 80 meters north and twenty east)
>=20
> I believe Jan Hartman from the Netherlands also encountered this=20
> problem. In mapserver It can easily be repaired by changing the=20
> +proj=3Dstere with +proj=3Dsterea.  =20
>=20
> =20
>=20
> So the proj string becomes:
>=20
> =20
>=20
> =20
>=20
> # Amersfoort / RD New
>=20
> <28992> +proj=3Dsterea +lat_0=3D52.15616055555555 +lon_0=3D5.3876388888=
8889=20
> +k=3D0.999908 +x_0=3D155000 +y_0=3D463000 +ellps=3Dbessel +units=3Dm=20
> +towgs84=3D565.2369,50.0087,465.658,-0.406857330322398,0.35073267654256=
3,-1.8703473836068,4.0812=20
> +no_defs <>
>=20
> =20
>=20
> =20
>=20
> But Geoserver does not use these proj settings. It uses a WKT list. Has=
=20
> anybody any ideas about changing the settings below as that it is the=20
> same as the proj. string above? By changing the false easting and=20
> northing parameters I can align them reasonably good., But I think that=
=20
> is not the solution. Is it?
>=20
> =20
>=20
> =20
>=20
> 28992=3DPROJCS["Amersfoort / RD=20
> New",GEOGCS["Amersfoort",DATUM["Amersfoort",SPHEROID["Bessel=20
> 1841",6377397.155,299.1528128,AUTHORITY["EPSG","7004"]],AUTHORITY["EPSG=
","6289"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0=
.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4289"]],PR=
OJECTION["Oblique_Stereographic"],PARAMETER["latitude_of_origin",52.15616=
055555555],PARAMETER["central_meridian",5.38763888888889],PARAMETER["scal=
e_factor",0.9999079],PARAMETER["false_easting",155000],PARAMETER["false_n=
orthing",463000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG=
","28992"]]
>=20
> =20
>=20
> =20
>=20
> Greetings,
>=20
> =20
>=20
> Wim Blanken
>=20
> The Netherlands
>=20

--=20
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University=09
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843


-- 
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.441 / Virus Database: 268.17.37/682 - Release Date: 12-2-2007
1=
3:23