OVF file syntax

[P Kishor]

On 8/11/06, Tyler Mitchell <tylermitchell at shaw.ca> wrote:
> On 11-Aug-06, at 3:57 PM, P Kishor wrote:
>
> > I have a CSV file called 'foo.txt' inside a directory called 'bar'.
> > The first row contains column headers. I am trying to construct a
> > meaningful OVF file like so, but failing.
> >
> > <OGRVRTDataSource>
> >  <OGRVRTLayer  name="foo">
> >  <SrcDataSource>CSV:"C:\\path\\to\\bar"</SrcDataSource>
> >  <SrcLayer>foo.txt</SrcLayer>
> >  <GeometryField encoding="PointFromColumns" x="LONGITUDE"
> > y="LATITUDE"/>
> >  <GeometryType>wkbPoint</GeometryType>
> >  </OGRVRTLayer>
> > </OGRVRTDataSource>
>
> Hi Puneet,
>
>  From my experience you have to treat the text file as the datasource
> and the (only) layer will have the same prefix.  So don't point to
> the folder, instead point to the file itself as the datasource.
> Also, it seems ogr likes to have the CSV file with a .csv extension.
> Even adding that CSV: prefix doesn't do the trick for me - so rename
> your text file.
>
> So here is what works for me:
>
> $ cat foo.ovf
> <OGRVRTDataSource>
> <OGRVRTLayer name="foo">
> <SrcDataSource>foo.csv</SrcDataSource>
> <SrcLayer>foo</SrcLayer>
> <GeometryField encoding="PointFromColumns" x="lon" y="lat"/>
> <GeometryType>wkbPoint</GeometryType>
> </OGRVRTLayer>
> </OGRVRTDataSource>
>
> $ cat foo.csv
> "lat","lon"
> 54,124
> 55,122
>
> Hope it helps,


Thanks, but unfortunately no. Here is my situation --

> cd "C:\My Documents\resources"
> less foo.ovf
<OGRVRTDataSource>
  <OGRVRTLayer name="foo">
  <SrcDataSource>"C:\\My Documents\\Data\\foo.csv"</SrcDataSource>
  <SrcLayer>foo</SrcLayer>
  <GeometryField encoding="PointFromColumns" x="LONGITUDE" y="LATITUDE"/>
  <GeometryType>wkbPoint</GeometryType>
  </OGRVRTLayer>
</OGRVRTDataSource>

> less proj.txt
PROJCS['USA_Contiguous_Lambert_Conformal_Conic',GEOGCS['GCS_Nor...

> cd "C:\My Documents\Data"
> less foo.csv
ID,A,B,C,D,E,LONGITUDE,LATITUDE,F
1,10,,,,,-106.524288,35.139437,
2,10,,,,,-106.522907,35.132337,
3,10,,,,,-106.519838,35.148427,

> cd "C:\My Documents\Home"
> ogr2ogr -f "ESRI Shapefile" \
    -a_srs "C:\\My Documents\\resources\\proj.txt" \
    -t_srs "C:\\My Documents\\resources\\proj.txt" \
    foo_shapefile \
    "C:\\My Documents\\resources\\foo.ovf"

Couldn't run: ogr2ogr -f "ESRI Shapefile" -a_srs "C:/My
Documents/resources/proj.txt" -t_srs "C:/My
Documents/resources/proj.txt" foo_shapefile "C:/My
Documents/resources/foo.ovf" (No such file or directory)

I can't tell whether ogr2ogr can't file 'foo.ovf', or it can't find
the files referenced inside 'foo.ovf', or if I have something else
wrong altogether.


-- 
Puneet Kishor http://punkish.eidesis.org/
Nelson Inst. for Env. Studies, UW-Madison http://www.ies.wisc.edu/
Open Source Geospatial Foundation https://edu.osgeo.org/