RE: [OpenMap Users] coord transformation

I found this website that looked like it had conversions from wgs84 to other datums:

http://www.colorado.edu/geography/gcraft/notes/datum/dlist.html

I also found a reference to something called cs2cs which may be able to do the conversion.

Hope this helps,
k

At 11:28 AM 9/9/2003 +0200, Stundzig, Steffen wrote:
>Hi Simon,
>
>did you have checked the geotools2 from www.geotools.org. It looks like,
>that they have an implementation of the OGC Coordinate Transformation
>Services in Java. But I don't know, if this fits our needs.
>
>
>Regards
> Steffen...
>
>
>
>-----Original Message-----
>From: Simon Bowen [mailto:sbowen@gammaprojects.com]
>Sent: Friday, September 05, 2003 3:56 PM
>To: 'Stundzig, Steffen'; 'openmap-users@bbn.com'
>Cc: Simon Bowen
>Subject: RE: [OpenMap Users] coord transformation
>
>
>Steffen,
>I am working on a similar problem, but I am using Swedish coordinate
>systems, namely
> RT90 (Rikets Koordinatsystem 1990)
>You mention 'Gauss Kruger' as your coordinate system, but to my knowledge
>Gauss Kruger is a Projection more commonly known as Transverse Mercator.
>RT90 (in all it's forms) uses the Transverse Mercator (or Gauss Kruger)
>projection with the Bessel 1841 Ellipsoid. The combination of the Transverse
>Metcator Projection and the Bessel 1841 Ellipsoid forms the Datum used with
>the RT90 coordinate system.
>OpenMap supports the standard Mercator projection which is a Cylindrical
>projection where the cylinder is wrapped around the equator (see
>com.bbn.openmap.proj.Mercator). However the Transverse Mercator projection,
>again a cylindrical projection, but the cylinder is wrapped around the poles
>rather that the equator. Transverse Mercator does not seem to be supported
>within OpenMap.
>I am working on some coordinate transformation algorithms, and experimenting
>with other open source API's to try and achieve the conversion and
>subsequently the correct projection between WGS84 and Easting Nothings for
>European based coordinate systems (all plugging into OpenMap). I seem to
>have the transformation working (to a point) but I believe I am missing the
>Transverse Mercator projection.
>I'm sorry I do not have any answers for you, but I believe that we are in
>the same position, Ideally we need a good solid implementation of the
>opengis.org coordinate transformation services specification, and a wider
>range of projections within OpenMap. Possibly we can collaborate together,
>and put out a call for any other """OpenMappers!""" operating in Europe that
>have a need for such functionality.
>Regards
>Simon
>Here is what I have found on German Reference Systems
>see(http://www.geocities.com/CapeCanaveral/1224/prj/de/de.html)
>Rauenberg - DHDN (Potsam Datum)
> Ellipsoid: Bessel 1841
> Map Projection: Gauß-Krüger
> Central Point/Datum: Rauenberg (Substitute: Potsdam Helmertturm)
>Potsdam Datum
> Ellipsoid: Hayford 1909/International 1924
> Map Projection: Lambert Conforml Conic
> Central Point/Datum: Rauenberg/Potsdam Helmertturm
>System 42/83 - EAGN
> Ellipsoid: Krassowskij 1940
> Map Projection: Gauß-Krüger
> Central Point/Datum: Pulkowo
>Europäisches Datum 1950 - ED 50
> Ellipsoid: Hayford 1909/International 1924
> Map Projection: UTM
> Central Point/Datum: Potsdam Helmertturm
>European Terrestrial Reference System 1989 - ETRS89
> Ellipsoid: GRS80
> Map Projection: UTM
> Central Point/Datum: Earth Centred (geocetric) - ITRS89/WGS84
>
>
>
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>-----Original Message-----
>From: Stundzig, Steffen [mailto:Steffen.Stundzig@gdmcom.de]
>Sent: 04 September 2003 15:20
>To: 'openmap-users@bbn.com'
>Subject: [OpenMap Users] coord transformation
>
>
>Hi all,
>I need to transform WGS84 LatLon coordinates into e.g. the german metric
>coordinate system 'Gauss Krueger'. Has anybody an idea on how to do that?
>All I've found was the UTMPoint to transform LatLon's into metric
>coordinates.
>Regards
> Steffen Stundzig...
>--
>Steffen Stundzig Tel: +49 (0) 341 443-2715
>Softwareentwicklung Fax: +49 (0) 341 443-2795
>GDMcom mbH * Braunstraße 7 * 04347 Leipzig * http://www.gdmcom.de/
>
>
>
>
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