Mateusz, You have to change the OGRVRTLayer name property to point to the file name without the extension. Also change the SrcDataSource element.
FYI, this process creates a vector file with points. gdal_polygonize produces polygons. 2011/8/10 Mateusz Kędzior <matand...@gmail.com> > Hi again, > > is it mandatory to create such file? > Regarding to information on GDAL/OGR page should I create simple text file > which contains only other OGRVRTLayer name property : > > <OGRVRTDataSource> > <OGRVRTLayer name="test"> > <SrcDataSource>test.csv</SrcDataSource> > <GeometryType>wkbPoint</GeometryType> > <LayerSRS>WGS84</LayerSRS> > <GeometryField encoding="PointFromColumns" x="Longitude" > y="Latitude"/> > </OGRVRTLayer> > </OGRVRTDataSource> > > ============== > Best regards, > Mateusz > > W dniu 9 sierpnia 2011 20:13 użytkownik Chaitanya kumar CH < > chaitanya...@gmail.com> napisał: > >> Create a text file with just the header. Use the cat command to join this >> file and the xyz file. >> $ cat HeaderFile.csv file1.csv > file1.cHi sv >> >> You can repeat this on all files in a shell script. >> >> Otherwise add the following line in the gdal2xyz.py script at line 144 >> [1]. >> >> dst_fh.write( 'Longitude,Latitude,Name' ) >> >> You will also have to create a separate vrt file for each csv file. The >> SrcDataSource element value changes for each file. >> >> [1]: >> http://trac.osgeo.org/gdal/browser/trunk/gdal/swig/python/scripts/gdal2xyz.py?rev=21127#L145 >> >> >> 2011/8/9 Mateusz Kędzior <matand...@gmail.com> >> >>> Chaitanya, >>> >>> if I understand properly, I need to add one line to each of processed >>> files. >>> How I can do it quickly? Is there any option in gdal2xyz.py script? >>> >>> If no - what would You recommend? >>> I think about sed utility, but it's general difficult in use. >>> >>> When I am thinking about Python I see only one possibility - load each >>> file to variable and then assign to another first line plus variable and at >>> last - save it. >>> >>> ============== >>> Best Regards, >>> Mateusz >>> >>> W dniu 9 sierpnia 2011 13:38 użytkownik Chaitanya kumar CH < >>> chaitanya...@gmail.com> napisał: >>> >>> Mateusz, >>>> >>>> gdal2xyz.py creates space delimited fields. Consider running it with the >>>> -csv option to delimit it with comma. >>>> Now you can almost use it as a csv format vector file. You just need to >>>> add a header row and define a small VRT file as described in OGR's CSV >>>> driver page[1]. >>>> Run ogrinfo and ogr2ogr on the .vrt file to check the file. >>>> >>>> [1]: http://www.gdal.org/ogr/drv_csv.html >>>> >>>> 2011/8/9 Mateusz Kędzior <matand...@gmail.com> >>>> >>>>> Hello, >>>>> >>>>> I would like to show value of each raster cell as label. My idea (I >>>>> don't know any plugin or any functionality in GDAL/OGR which allow to do >>>>> it >>>>> easier) is to export raster using gdal2xyz.py into coordinates-value >>>>> format >>>>> and then save it as vector (GML or shapefile). For this second task, I try >>>>> to use >>>>> >>>>> ================================================================================================================================================= >>>>> gdal_polygonize.py: >>>>> gdal_polygonize.py rainfXYZ.txt rainf.shp Creating output rainf.shp of >>>>> format GML. 0...10...20...30...40...50...60...70...80...90...100 - done. >>>>> >>>>> ================================================================================================================================================= >>>>> unfortunately I am unable to load created file (even if I change the >>>>> extension to .gml) >>>>> ogr2ogr tool don't even recognize this format. >>>>> >>>>> ========================= >>>>> Thank You in advance, >>>>> Mateusz >>>>> >>>>> _______________________________________________ >>>>> gdal-dev mailing list >>>>> gdal-dev@lists.osgeo.org >>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev >>>>> >>>> >>>> >>>> >>>> -- >>>> Best regards, >>>> Chaitanya kumar CH. >>>> >>>> +91-9494447584 >>>> 17.2416N 80.1426E >>>> >>> >>> >> >> >> -- >> Best regards, >> Chaitanya kumar CH. >> >> +91-9494447584 >> 17.2416N 80.1426E >> > > -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E
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