[mapserver-users] convert projection from UTM to WGS84 using proj

[Jørn Vegard Røsnes]

Hi,

I lost your previous email, so this is just by memory.
I'm not an projection expert, but here we go :-)

Regarding 3dg offset:
In your .prj file there is an false easting=500000, so maybe it helps adding +x_0=500000.
http://proj.maptools.org/gen_parms.html
Se also +towgs84 in the same link and .prj file, and adjust accordingly.

Maybe a shot in the dark because 3dg = 333958,33m (40 075,017km / 360dg).
I think you're near the solution.

See also
http://spatialreference.org/
http://spatialreference.org/ref/epsg/4230/

kind regards
Jørn-Vegard Røsnes

----- Original Message -----
> From: "Jørn Vegard Røsnes" <jorn at spacetec.no>
> To: "Murat Beyhan" <beyhan at deprem.gov.tr>
> Cc: "mapserver-users" <mapserver-users at lists.osgeo.org>
> Sent: Wednesday, 16 May, 2012 11:21:22 AM
> Subject: Re: [mapserver-users] convert projection from UTM to WGS84 using proj
> 
> Hi,
> maybe something like this:
> 
> ogr2ogr -s_srs epsg:4230 -t_srs epsg:4326  <dest shapefile> <source
> shapefile>
> 
> http://www.gdal.org/ogr2ogr.html
> 
> kind regards
> Jørn-Vegard Røsnes
> 
> ----- Original Message -----
> > From: "Murat Beyhan" <beyhan at deprem.gov.tr>
> > To: "mapserver-users" <mapserver-users at lists.osgeo.org>
> > Sent: Wednesday, 16 May, 2012 10:41:39 AM
> > Subject: [mapserver-users] convert projection from UTM to WGS84
> > using proj
> >
> > Dear friends,
> > I'm sorry, I'm not good at GIS applications but I wondering about
> > conversion between various projection or datum of the data files.
> >
> > data.shp data.shx data.dbf and data.prj files are available.
> >
> > shpdump data.shp gives following
> >
> > Shape:0 (ArcZ)  nVertices=4, nParts=1
> >   Bounds:(  513275.786, 4006041.761, 0, 0)
> >       to (  513345.812, 4006078.182, 0, 0)
> >      (  513275.786, 4006078.182, 0, 0) Ring
> >      (  513301.130, 4006064.906, 0, 0)
> >      (  513321.636, 4006053.249, 0, 0)
> >      (  513345.812, 4006041.761, 0, 0)
> > ...
> >
> >
> >
> >
> >
> > data.prj as follows
> >
> > PROJCS["(UTM)Universal Transvers Merkator 3�",GEOGCS["EUROPEAN
> > 1950",DATUM["European_Datum_1950",SPHEROID["International",6378388.00000000,297.00000000],
> > TOWGS84[-87.00000000,-98.00000000,-121.00000000,0.00000000,0.00000000,0.00000000,0.00000000]],
> > PRIMEM["Greenwich",0.00000000],UNIT["Degree",0.01745329],AUTHORITY["EPSG","4230"]],PROJECTION["TRANSVERSE_MERCATOR"],
> > PARAMETER["SCALE_FACTOR",1.00000000],PARAMETER["CENTRAL_MERIDIAN",36.00000000],PARAMETER["LATITUDE_OF_ORIGIN",0.00000000],
> > PARAMETER["FALSE_EASTING",500000.00000000],PARAMETER["FALSE_NORTHING",0.00000000],UNIT["meter",1.00000000]]
> >
> >
> > using these data How to convert a file which is created using
> > european_datum_1950 to WGS84 (World Geodetic System 1984)
> > or where I have to start to understand these method of applications
> > using PROJ4.
> > Thanks
> > muratB
> >
> >
> > --
> > This message has been scanned for viruses and
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> > believed to be clean.
> >
> > _______________________________________________
> > mapserver-users mailing list
> > mapserver-users at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/mapserver-users
> >
> 

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