[gdal-dev] Getting unique values from a raster band

2011-03-21 Thread Tom Jeffery
when I view the same rasters in ArcCatalog and bring up the "Table" view, it is able to instantly display the typical Value / Count table. Is there some trick I'm missing here on how to get these values? Thanks very much! Tom Jeffery ___

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

2010-08-05 Thread Tom Jeffery
Frank, Your solution seems to work for me. I don't know ArcGIS well enough to dig into why it behaves that way, but deleting the features outside the claimed extent (they aren't showing up as null in ogr), then using ogr2ogr does result in a safe, non-corrupt shapefile that is usable with both A

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

2010-08-04 Thread Tom Jeffery
ndled. The only way I can think of to clean such a file is by checking the geometry in each feature. On Thu, Aug 5, 2010 at 1:01 AM, Tom Jeffery wrote: > > Chaitanya, > > I've found the issue with the particular shapefile I'm using. It actually > has some null geometri

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

2010-08-04 Thread Tom Jeffery
ometry and check if the > OGREnvelope::MinX and OGREnvelope::MinY values are within the expected > extents. You can isolate the problem this way. > > Otherwise, put together a sample dataset and create a new ticket at > http://trac.osgeo.org/gdal/newticket > > On Wed, Aug 4, 20

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

2010-08-04 Thread Tom Jeffery
Chaitanya, The updated file is read properly with ogrinfo. The only difference between ogrinfo -al between the two, besides the new field that was created, is the extent, which looks like this: Original file: Extent: (1528126.013001, 45899.818172) - (1542444.478012, 61468.662925) Updated file:

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

2010-08-04 Thread Tom Jeffery
ws 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 appr