[Proj] Swiss CORINE: Bessel 1841 Hotine Oblique MercatorAzimuth Natural Origin?

Fri Jul 10 10:00:27 PDT 2009

I believe the current datums are: "CH1903+" and "CHTRS95."

See my August 2001 column on Switzerland at: www.ASPRS.org/resources/grids .

C. Mugnier

________________________________

From: proj-bounces at lists.maptools.org on behalf of Markus Neteler
Sent: Fri 10-Jul-09 09:18
To: Ziegler Stefan
Cc: proj
Subject: Re: [Proj] Swiss CORINE: Bessel 1841 Hotine Oblique MercatorAzimuth Natural Origin?

Hi Stefan,

I should have asked earlier here :) Thanks a lot.
However, the map seems to be shifted for 200-300 meters.
If there any datum which I should specify? This reminds me
of
http://trac.osgeo.org/grass/ticket/35

Best regards
Markus Neteler

On Fri, Jul 10, 2009 at 4:07 PM, Ziegler Stefan<Stefan.Ziegler at bd.so.ch> wrote:
> Hi Markus
> try this:
> ogr2ogr shp_dir/ -s_srs epsg:21781 -t_srs epsg:3035 clcbn85p.shp
> epsg:21781 is forcing ogr2ogr to use the real swiss prj-definition. Forget
> the strange definition in the delivered prj-file.
> regards
> Stefan
>> -----Ursprüngliche Nachricht-----
>> Von: Markus Neteler [mailto:neteler at osgeo.org]
>> Gesendet am: Freitag, 10. Juli 2009 14:59
>> An: PROJ.4 and general Projections Discussions
>> Betreff: Re: [Proj] Swiss CORINE: Bessel 1841 Hotine Oblique Mercator
>> Azimuth Natural Origin?
>>
>> Dear list members,
>>
>> I was earlier sending this message to the gdal-dev list without
>> answer. trying here now:
>>
>> On Mon, Jun 8, 2009 at 5:24 PM, Markus
>> Neteler<neteler at osgeo.org> wrote:
>> > hi,
>> >
>> > I am trying to reproject the Swiss CORINE data CLC90 [1] into LAEA.
>> > The .prj file is attached. Unfortunately the transformation fails:
>> >
>> > ogr2ogr -t_srs eu_etrs89_laea.prj /tmp/clc90_eu_laea.shp
>> /geodata/clcbn85p.shp
>> > ERROR 6: Failed to initialize PROJ.4 with `+proj=omerc
>> > +lat_0=46.95240555555556 +lonc=7.439583333333333 +alpha=90 +k=1
>> > +x_0=-9419820.590700001 +y_0=200000 +ellps=bessel +units=m
>> +no_defs '.
>> > lat_0 = 0 or 90 or alpha = 90
>> > Failed to create coordinate transformation between the
>> > following coordinate systems.  This may be because they
>> > are not transformable, or because projection services
>> > (PROJ.4 DLL/.so) could not be loaded.
>> > Source:
>> > PROJCS["Bessel_1841_Hotine_Oblique_Mercator_Azimuth_Natural_Origin",
>> >    GEOGCS["GCS_Bessel_1841",
>> >        DATUM["Not_specified_based_on_Bessel_1841_ellipsoid",
>> >            SPHEROID["Bessel_1841",6377397.155,299.1528128]],
>> >        PRIMEM["Greenwich",0.0],
>> >        UNIT["Degree",0.0174532925199433]],
>> >    PROJECTION["Hotine_Oblique_Mercator"],
>> >    PARAMETER["False_Easting",-9419820.5907],
>> >    PARAMETER["False_Northing",200000.0],
>> >    PARAMETER["Scale_Factor",1.0],
>> >    PARAMETER["Azimuth",90.0],
>> >    PARAMETER["Longitude_Of_Center",7.439583333333333],
>> >    PARAMETER["Latitude_Of_Center",46.95240555555556],
>> >    UNIT["Meter",1.0]]
>> > Target:
>> > PROJCS["ETRS89 / ETRS-LAEA",
>> >    GEOGCS["ETRS89",
>> >        DATUM["European_Terrestrial_Reference_System_1989",
>> >            SPHEROID["GRS 1980",6378137,298.2572221010042,
>> >                AUTHORITY["EPSG","7019"]],
>> >            AUTHORITY["EPSG","6258"]],
>> >        PRIMEM["Greenwich",0],
>> >        UNIT["degree",0.0174532925199433],
>> >        AUTHORITY["EPSG","4258"]],
>> >    UNIT["metre",1,
>> >        AUTHORITY["EPSG","9001"]],
>> >    AUTHORITY["EPSG","3035"]]
>> >
>> > Suggestions welcome to reproject this data set...
>> >
>> > thanks
>> > Markus
>> >
>> > [1]
>> http://www.bfs.admin.ch/bfs/portal/de/index/dienstleistungen/g
> eostat/datenbeschreibung/corine_land_cover.html
>>    Data: -> GIS-Daten CORINE Land Cover Schweiz 1990 (ZIP file)
>>
> Is there a way to enable PROJ4 to support this projection?
> thank in advance,
> Markus
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