thanks, this is my flow:
dump out some oracle db content into a .gml (xml) file with many features,
then convert the gml to shape file (.shp) using ogr2ogr
i tried to add a custom attr to the gml file, but from the resulting shape
file i can't find the custom attr
yeah, let me dig more on the dbf part
On Jan 30, 2012 11:16 PM, "Jody Garnett" <[email protected]> wrote:
> Not sure about what you are trying to do ....
>
> The feature retrieved from a FeatureCollection represents a read-only row
> in your shapefile. To edit you will need to call featureStore
> modifyFeatures as in the tutorials; or using a FeatureWriter you can go
> through the whole shapefile and make modifications as you write it out.
>
> Secondly the feature content has to match the header of your DBF file; you
> cannot add new attributes as each one has to match an existing column name.
>
> What you can do is make a new shapefile (with your new column) and read
> from your origional shapefile; and copy the values over (and your new
> value) one feature at a time. This is what we do in the uDig "reshape"
> operation.... which is used to add columns, remove columns, and generate
> new columns from a small expression.
>
> Jody
>
> On Tue, Jan 31, 2012 at 11:50 AM, Yang <[email protected]> wrote:
>
>> currently we have features stored shape files, and we query them by
>> "intersection" filter with a lat-lon point.
>>
>> collection = myFeatureSource.getFeatures(query);
>>
>> we would like to add certain custom attrs/data to the feature. currently
>> we pull out the standard properties by
>>
>>
>> FeatureIterator<SimpleFeature> iter = collection.features();
>>
>> while (iter.hasNext()) {
>> SimpleFeature feature = iter.next();
>> Collection<Property> props = feature.getProperties();
>>
>>
>>
>> but after I manually added the custom attr to the .xml data store file,
>> the above call on "feature.getProperties()" does not return this new
>> custom property.
>>
>>
>> I also tried SimpleFeature.getAttributes(), it's basically the same
>> result as getProperties()
>>
>> anything else I could try??
>>
>> Thanks a lot
>> Yang
>>
>>
>>
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