[GeoNode-users] Layers with epsg:4618 shiffting in GeoNode

[Daniel Victoria]

-- replying to the list --

Hi Stefan,

Thanks for the input. EPSG:4618 is a geographic coordinate system based on
the South American Datum. And apparently somewhere GeoNode is not liking
this coordinate system. If I convert the data to EPSG:4326 in QGis prior to
uploading, it all works fine. Could it be that QGIS understands the .prj
file for the EPSG:4618 but GeoNode does not and assumes EPSG:4326?

By looking at the ISO metadata from the EPSG:4618 layer, it tells me that
the data is in EPSG:4326. Does GeoNode converts the SRS on layer upload? Or
is that telling me that my projection file was bogus?

Thanks
Daniel



On Tue, Jun 16, 2015 at 2:29 PM, Stefan Steiniger <sstein at geo.uzh.ch> wrote:

>  perhaps a silly question:
>
> (a) are you indeed having the same coordinate system (same prj files?) for
> both shape files?
> (b) what happens if you not use epsg:4618 but some UTM? (sorry can't
> figure exactly what 4618 is... it looks like geographic coordinates, so
> perhaps a projection makes sense)
>
> see also this:
> http://wiki.osgeo.org/wiki/Brazilian_Coordinate_Reference_Systems
>
> cheers,
> stefan
>
>
> On 06/16/2015 11:26 AM, Daniel Victoria wrote:
>
>   ​
>  point_error.7z
> <https://drive.google.com/file/d/0B5VE16NDdlfERE5yenZNaHY2bTA/edit?usp=drive_web>
> ​​
>  TC_AC_2010_00167.zip
> <https://drive.google.com/file/d/0B5VE16NDdlfEaGNHZ2ZSU0RjMHM/edit?usp=drive_web>
> ​I've got two shapefiles with epsg:4618. One is a polygon layer with
> loads of geometry errors and the second is a point layer with the error
> location. When I load both in QGIS, polygons and errors are aligned
> (layers_qgis.png). I then uploaded the layers to GeoNode (2.4b24) and
> points and polygons have shifted (layers_geonode.png).
>
> I then added back the two layers in QGis using WMS services. The points
> layer shifted a little (~8 meters - point_error.png) but polygons shifted
> 69 m (poly_error.png).
>
> Any idea what could be wrong?
>  The shapefiles (poligon and points) can be downloaded from the google
> drive links
>
>  Thanks
>  Daniel
>
>
> _______________________________________________
> geonode-users mailing listgeonode-users at lists.osgeo.orghttp://lists.osgeo.org/cgi-bin/mailman/listinfo/geonode-users
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/geonode-users/attachments/20150616/51610670/attachment.html>