[OSM-talk] Help to import Rio de Janeiro city data to OSM - misaligned shapefiles

[Arlindo Pereira]

The PRJ files says:

PROJCS["SAD_1969_UTM_Zone_23S",GEOGCS["GCS_South_American_1969",DATUM["D_South_American_1969",SPHEROID["GRS_1967_Truncated",6378160.0,298.25]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",10000000.0],PARAMETER["Central_Meridian",-45.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

ogr2ogr/ogr2osm.py seems to be aware of it:

nighto at inspiron1525:~/Projetos/basegeo$ python ogr2osm.py ciclovias.shp
/usr/lib/python2.6/dist-packages/osgeo/gdal.py:99: DeprecationWarning:
ogr.py was placed in a namespace, it is now available as osgeo.ogr
  DeprecationWarning)
([], ['ciclovias.shp'])

Preparing to convert file ciclovias.shp (extension is shp) into
ciclovias.osm
Will try to detect projection from source metadata, or fall back to
EPSG:4326

Parsing features
Detected projection metadata:
PROJCS["SAD_1969_UTM_Zone_23S",
    GEOGCS["GCS_South_American_1969",
        DATUM["South_American_Datum_1969",
            SPHEROID["GRS_1967_Truncated",6378160.0,298.25]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",500000.0],
    PARAMETER["False_Northing",10000000.0],
    PARAMETER["Central_Meridian",-45.0],
    PARAMETER["Scale_Factor",0.9996],
    PARAMETER["Latitude_Of_Origin",0.0],
    UNIT["Meter",1.0]]

['Codigo', 'Nome', 'Fonte', 'area', 'len']
Got layer field definitions

Nodes: 2055
Way segments: 2018
Lines: 54
Areas: 0

Joining segments

Simplifying line segments

Simplifying area segments

Simplifying remaining nodes

Nodes: 2055
Original way segments: 2018
Segment join operations: 1964
Lines: 54
Areas: 0

Generating OSM XML...
Generating nodes.

Generated nodes. On to lines.

Generated lines. On to areas.

All done. Enjoy your data!

Thanks

2010/5/14 maning sambale <emmanuel.sambale at gmail.com>

> This is usually a datum shift/SRS issue.  Check if you have the
> correct projection and datum of the shapefile.  Ths is contained in
> the prj file (filename.prj)
>
>
> On Fri, May 14, 2010 at 11:30 AM, Arlindo Pereira
> <openstreetmap at arlindopereira.com> wrote:
> > Hi there,
> > I just managed to get the permission to import import the city government
> > data into OSM. However, I'm not able to import it to JOSM successfully.
> > The data is on different shapefiles, that for greater convenience I
> mirrored
> > on my webserver:
> > http://nighto.net/rio.zip
> > http://nighto.net/rio/
> > I found out that the easiest way to have an .osm file editable on JOSM
> would
> > be using Iván's ogr2osm.py [1] and it worked out pretty well. However,
> the
> > tracks are misaligned with the tracks I already have collected with GPS
> > (which is aligned to the Yahoo! imagery, so they're not bad tracks).
> Please
> > check this
> > screenshot: http://img534.imageshack.us/img534/7035/capturadetelak.png
>  In
> > this example, i converted the "ciclovias.*" files (cycleways) to .osm,
> > opened in JOSM and downloaded this area. The shapefile converted way is
> > selected (red) and the OSM (captured with GPS) is in dark grey.
> > Any ideas? I don't think that the government data is misaligned like
> that.
> > Also, selecting all the ways on the converted osm layer on JOSM and drag
> > over until they align with something that already exists could work out,
> but
> > there's probably a better way to do it. I thought about creating a shell
> > script to add/subtract the lat/lon numbers on all nodes, but maybe
> someone
> > would come out with a magical conversion that would work out perfectly :)
> > Thanks a lot!
> > Cheers,
> > Arlindo "Nighto" Pereira
> > 1:
> http://svn.openstreetmap.org/applications/utils/import/ogr2osm/ogr2osm.py
> > _______________________________________________
> > talk mailing list
> > talk at openstreetmap.org
> > http://lists.openstreetmap.org/listinfo/talk
> >
> >
>
>
>
> --
> cheers,
> maning
> ------------------------------------------------------
> "Freedom is still the most radical idea of all" -N.Branden
> wiki: http://esambale.wikispaces.com/
> blog: http://epsg4253.wordpress.com/
> ------------------------------------------------------
>
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