[gdal-dev] Editing attributes with ogr causing corrupt shapefile

[Chaitanya kumar CH]

Tom,

Can you check the destination shapefile with 'ogrinfo' and see if it works?
If ogrinfo gives a valid output of the new file, check with 'ogrinfo -al'
and compare it with the old file's output.
( http://www.gdal.org/ogrinfo.html )

On Wed, Aug 4, 2010 at 6:57 PM, Tom Jeffery <tjeffery at gmail.com> wrote:

>
> I'm working with GDAL's Java bindings, and trying to simply add an index
> field to a shapefile.  This is working, but the resulting shapefile gets
> corrupted somehow, where viewing it in ArcMap causes the message "Warning,
> inconsistent extent." and viewing it in ArcCatalog shows all the points in
> the shapefile in the very upper left corner of the preview.  (Viewing the
> metadata tab in ArcCatalog will crash the program.)
>
> Below is the method where I'm adding the index field... is there anything
> I'm missing / obviously wrong here?  Any help would be greatly appreciated!
>
> Thanks,
> -Tom Jeffery
>
>        public static void addIndex(File input, String fieldName) throws
> Exception
> {
>                ogr.RegisterAll();
>                DataSource dataSource = ogr.Open(input.getAbsolutePath(),
> true);
>
>                if (dataSource == null) {
>                        throw new Exception("Error opening input file while
> trying to add
> index.");
>                }
>
>                // Shapefiles have a single layer
>                Layer layer = dataSource.GetLayer(0);
>
>                // Creating an OFTInteger alone didn't seem to do the trick,
> but setting
> the width to 9 created a "Long Integer"
>                // field (as viewed in ESRI)
>                FieldDefn newField = new FieldDefn(fieldName,
> ogr.OFTInteger);
>                newField.SetWidth(9);
>                int result = layer.CreateField(newField);
>                if (result != ogr.OGRERR_NONE)
>                        throw new Exception("Got OGR error code: " + result
> + " when trying to
> add new field to shapefile.");
>
>                for (int i = 0; i < layer.GetFeatureCount(); i++) {
>                        org.gdal.ogr.Feature feature = layer.GetFeature(i);
>                        feature.SetField(fieldName, i);
>                        layer.SetFeature(feature);
>                        feature.delete();
>                }
>                // you must call "delete" (or Destroy in c/c++) to properly
> close / write
> the datasource..
>                layer.delete();
>                dataSource.delete();
>        }
> --
> View this message in context:
> http://osgeo-org.1803224.n2.nabble.com/gdal-dev-Editing-attributes-with-ogr-causing-corrupt-shapefile-tp5372483p5372483.html
> Sent from the GDAL - Dev mailing list archive at Nabble.com.
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>



-- 
Best regards,
Chaitanya kumar CH.
/tʃaɪθənjə/ /kʊmɑr/
+91-9494447584
17.2416N 80.1426E
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