[gdal-dev] Upgrading Version Not Working

[Nelson, Nicole]

Even,
   Is it possible that I am missing an external library? Do you know which
external libraries would be required to accomplish such a task?
Thanks,
Nicole

On 7/24/14, 1:03 PM, "Even Rouault" <even.rouault at mines-paris.org> wrote:

>Le jeudi 24 juillet 2014 21:49:19, Nelson, Nicole a écrit :
>> Hello,
>>    I am working on an application which was developed by another
>>developer
>> about 2 years ago. At the time the developer used GDAL 1.9.1. I am
>>trying
>> to upgrade to the latest version of GDAL (1.11.0). However, I am not
>>able
>> to get the same functionality to work. I am reading in a shape file with
>> ogr.Open which is successful. Then I am able to get a layer
>>successfully.
>> On that layer I try to apply a spatial filter with a single point
>>geometry
>> representing a latitude and longitude pair. However, when I call
>> GetNextFeature I always get null, regardless of the input. The
>> GetNextFeature function previously returned at least one feature. Did
>> something change in the versions that I may have missed?
>
>Nicole,
>
>Single point spatial filter must be an odd use case. Not sure this is
>present 
>in our regression tests, so that might have been accidentaly broken.
>However I 
>just made an experiment with GDAL trunk :
>
>$ cat square.csv
>id,WKT
>1,"POLYGON((0 0,0 1,1 1,1 0,0 0))"
>
>$ ogr2ogr square.shp square.csv
>
>
>$ ogrinfo square.shp -al -spat 0.25 0.5 0.25 0.5
>INFO: Open of `square.shp'
>      using driver `ESRI Shapefile' successful.
>
>Layer name: square
>Geometry: Polygon
>Feature Count: 1
>Extent: (0.000000, 0.000000) - (1.000000, 1.000000)
>Layer SRS WKT:
>(unknown)
>id: String (80.0)
>WKT: String (80.0)
>OGRFeature(square):0
>  id (String) = 1
>  WKT (String) = POLYGON((0 0,0 1,1 1,1 0,0 0))
>  POLYGON ((0 0,0 1,1 1,1 0,0 0))
>
>So at least on that example it seems to work.
>
>> Is there
>> something that would make GetNextFeature return null, but GetFeature at
>> various indices return values?
>
>Yes, GetFeature() doesn't take into account the spatial filter.
>
>Best regards,
>
>Even
>
>-- 
>Geospatial professional services
>http://even.rouault.free.fr/services.html