Support of Hungarian Unified Projection (EOV)

[pphunor]

MapServer does not display properly those layers that use shapefiles with EOV projection as data source. A small addition of code into ogr_srs_proj4.cpp solves this problem. The code below works fine for me, though it might be not enough to accept as a general solution.

OGRErr OGRSpatialReference::exportToProj4( char ** ppszProj4 ) const

...

    else if( EQUAL(pszProjection,
                   "Oblique_Mercator") )
    {
        //+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 +k_0=0.99993 +x_0=650000 +y_0=200000 +ellps=GRS67 +units=m +no_defs 
        sprintf( szProj4+strlen(szProj4),
                 "+proj=somerc +lat_0=%.16g +lon_0=%.16g +alpha=%.16g +k_0=%.16g +x_0=%.16g +y_0=%.16g ",
                 GetNormProjParm(SRS_PP_LATITUDE_OF_CENTER,0.0),
                 GetNormProjParm(SRS_PP_LONGITUDE_OF_CENTER,0.0),
                 GetNormProjParm(SRS_PP_RECTIFIED_GRID_ANGLE,0.0),
                 GetNormProjParm(SRS_PP_SCALE_FACTOR,0.0),
                 GetNormProjParm(SRS_PP_FALSE_EASTING,0.0),
                 GetNormProjParm(SRS_PP_FALSE_NORTHING,0.0) );
    }

    else if( EQUAL(pszProjection,SRS_PT_KROVAK) )
    {

...

[Even Rouault]

This is indeed not the appropriate change. The problem is on ingestion of the .prj, not on export. Which software did produce this NATURA.prj file ?

The current code which imports ESRI .prj files expect the PROJECTION name to be "Hotine_Oblique_Mercator_Azimuth_Natural_Origin". If you change PROJECTIONOblique_Mercator to PROJECTIONHotine_Oblique_Mercator_Azimuth_Natural_Origin, this works.

[pphunor]

Replying to rouault:

This is indeed not the appropriate change. The problem is on ingestion of the .prj, not on export. Which software did produce this NATURA.prj file ?

I don't know, I get this file from one of our clients, I just have to display it with mapserver.

The current code which imports ESRI .prj files expect the PROJECTION name to be "Hotine_Oblique_Mercator_Azimuth_Natural_Origin". If you change PROJECTIONOblique_Mercator to PROJECTIONHotine_Oblique_Mercator_Azimuth_Natural_Origin, this works.

Ok, thanks.

[Even Rouault]

Closing. Doesn't seem there's action needed on that one