[Qgis-developer] About Korean CRS

[Sanghee Shin]

Dear Frank, 

Thank you for your posting. Since I noticed GDAL 1.9 included new CRSes of Korea, I raised this issues here in QGIS project. 

According to one of README[1] file in metacrs project, GDAL is almost the starting point of updating CRS info in other softwares. I noticed that CRSes of QGIS is managed as spatialite db(srs.db and qgis.db) and also found that those CRSes could be updated using a shell script called qgis_srs.sh [2] I don't think this shell script reflect the recent schema of srs.db. However I think I can update or add new Korean CRS to QGIS CRS db. 

Thank you.

With regards,

Sanghee

[1]http://svn.osgeo.org/metacrs/geotiff/trunk/libgeotiff/csv/README
[2]https://github.com/qgis/Quantum-GIS/tree/master/resources

2012. 1. 22., 오전 7:37, Frank Warmerdam 작성:

> On Wed, Jan 18, 2012 at 10:14 AM, Sanghee Shin <endofcap at gmail.com> wrote:
>> Dear all,
>> 
>> South Korea made major CRS changes in 2010 and those new CRS were registered to official EPSG code in June, 2010. Those codes are EPSG:5173 ~ 5188. You can see those CRS information at http://www.epsg-registry.org/ by filtering Korea.
>> 
>> However we, Korean QGIS users who are mainly using QGIS 1.7.3, still couldn't find the new Korean CRS info in QGIS.
>> 
>> Anybody know the reasons or anybody could help us to solve this issue?
> 
> Sanghee,
> 
> I see that EPSG:5173 is supported by the GDAL 1.9 release.
> I'm a bit vague on how the QGIS srs'es are managed but I
> imagine the new CRSes can be added.  For EPSG:5173 I
> get the following definition from gdalsrsinfo.  Does that
> look reasonable to you?  Should there be a datum
> definition for the Korean_Datum_1985 to WGS84 available?
> 
> PROJ.4 : '+proj=tmerc +lat_0=38 +lon_0=125.0028902777778 +k=1
> +x_0=200000 +y_0=500000 +ellps=bessel +units=m +no_defs '
> 
> OGC WKT :
> PROJCS["Korean 1985 / Modified West Belt",
>    GEOGCS["Korean 1985",
>        DATUM["Korean_Datum_1985",
>            SPHEROID["Bessel 1841",6377397.155,299.1528128,
>                AUTHORITY["EPSG","7004"]],
>            AUTHORITY["EPSG","6162"]],
>        PRIMEM["Greenwich",0,
>            AUTHORITY["EPSG","8901"]],
>        UNIT["degree",0.0174532925199433,
>            AUTHORITY["EPSG","9122"]],
>        AUTHORITY["EPSG","4162"]],
>    PROJECTION["Transverse_Mercator"],
>    PARAMETER["latitude_of_origin",38],
>    PARAMETER["central_meridian",125.0028902777778],
>    PARAMETER["scale_factor",1],
>    PARAMETER["false_easting",200000],
>    PARAMETER["false_northing",500000],
>    UNIT["metre",1,
>        AUTHORITY["EPSG","9001"]],
>    AXIS["X",NORTH],
>    AXIS["Y",EAST],
>    AUTHORITY["EPSG","5173"]]
> 
> Best regards,
> -- 
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Software Developer