[Gdal-dev] OGR and python: File creation question...

[Bryan Keith]

Merhaba Aykut,

See below.

Aykut KOÇAK wrote:
> Hi to all,
> 
> I am trying the following simple python code to create a ESRI Shape 
> file. This script seems working fine. But when I checked the new file 
> with ogrinfo, I can not see the field I am trying to have within SHP 
> file. What am i doing wrong with this? Thanks in advance for all 
> suggestions.
> 
> 
> Regards,
> 
> 
> Python Code:
> --------------------
> 
> #
> import sys,os
> # Vector Mapping support
> import ogr
> 
> if __name__=="__main__":
>     # Create the driver to use
>     drv=ogr.GetDriverByName("ESRI Shapefile")
>     # Create the DataSource to be written
>     ds=drv.CreateDataSource("test.shp")
>     # Create a layer
>     lyr=ds.CreateLayer(name='test_layer',geom_type=ogr.wkbPoint)
>     # Prepare the structure of the a feature.
>     field_def=ogr.FieldDefn('test1',ogr.OFTInteger)

At this point in my code that works I have a line like this:

lyr.CreateField(field_def)

Hope that helps.

Bryan

>     feature_def=ogr.FeatureDefn(name='test_feature')
>     feature_def.AddFieldDefn(field_def)
>     feature_def.SetGeomType(ogr.wkbPoint)
>     # Create a feature using prepared structure
>     feature=ogr.Feature(feature_def)
>     # Set the value of the field for this feature
>     feature.SetField(0,173)
>     # Set the Geometry for this feature
>     geom=ogr.CreateGeometryFromWkt('POINT(%f %f)' % (32.0,39.0))
>     feature.SetGeometryDirectly(geom)
>     # Add this new feature to the Layer
>     lyr.CreateFeature(feature)
>     # be sure everything written to disk
>     lyr.SyncToDisk()
>     # Destroy the Data Source
>     ds.Destroy()
>     # exit gracefully
>     sys.exit(0)
>    
> 
> 
> ogrinfo results:
> ---------------------------------------------
> oot at clown-aero:~/project/python# ogrinfo test.shp -al
> INFO: Open of `test.shp'
> using driver `ESRI Shapefile' successful.
> 
> Layer name: test
> Geometry: Point
> Feature Count: 1
> Extent: (32.000000, 39.000000) - (32.000000, 39.000000)
> Layer SRS WKT:
> (unknown)
> FID: Real (11.0)
> OGRFeature(test):0
>   FID (Real) =           0
>   POINT (32 39)
> 
> 
>