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

[Gerald I. Evenden]

On Friday 10 July 2009 9:35:59 am Clifford J Mugnier wrote:
> Switzerland dropped the Rosenmund Oblique in favor of the Hotine Oblique
> RSO?
>
> Since when?
>
> C. Mugnier
> LOUISIANA STATE UNIVERSITY

Except for the false easting and northing, the other factors look similar to 
proj's proj=somerc projection parameters which brings up a point: I never saw 
a name declared anywhere for this projection which is basically a Gauss 
transformation to the sphere followed by coordinate shift on the shere.  In 
the case of the Swiss usage the polar axis is shifted in the plane of the 
central meridian until the equator is at the central point:

lon_0=7d26'22.50"
lat_0=46d57'08.66"

Hotine usage for Swiss projections keep comming up but I question that the 
Swiss ever used Hotine for anything domestic.

>
> ________________________________
>
> From: proj-bounces at lists.maptools.org on behalf of Markus Neteler
> Sent: Fri 10-Jul-09 07:59
> To: PROJ.4 and general Projections Discussions
> Subject: Re: [Proj] Swiss CORINE: Bessel 1841 Hotine Oblique
> MercatorAzimuth 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/geostat/date
> >nbeschreibung/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

-- 
The whole religious complexion of the modern world is due
to the absence from Jerusalem of a lunatic asylum.
-- Havelock Ellis (1859-1939) British psychologist