Re: [Geotools-gt2-users] Performance writing SHP files

[César M. I. <ces...@gm...>]

Some additional notes on this topic. The reported time (~63 minutes)
happens when the FeatureStore is a ShapefileDataStore.
When using a MemoryDataStore the process is much faster (~5 minutes).

However, I still think it is a lot of time, as the same algorithm
execution takes about 3 seconds when using the gvSIG-Sextante
bindings. Moreover, the MemoryDataStore is not a suitable solution for
big layers.

What's wrong with the code bellow?

Regards,

César

El día 21 de diciembre de 2009 16:19, César Martínez Izquierdo
<ces...@gm...> escribió:
> Hello list,
>
> I'm using Sextante through the GeoTools-Sextante bindings to create a
> Graticule (using CreateGraticuleBuilder algorithm form Sextante).
> This creates a shapefile containing a graticule of rectangles.
>
> However, performance is really poor: ~ 63 minutes to just write around
> 14000 features.
> The relevant part of code is:
>                                FeatureStore<SimpleFeatureType, SimpleFeature> store =
> ((FeatureStore<SimpleFeatureType, SimpleFeature>) getFeatureSource());
>                                List<Object> attributes = new ArrayList<Object>();
>                                attributes.add(geom);
>                                attributes.addAll(Arrays.asList(values));
>                                SimpleFeatureType ft = store.getSchema();
>                                FeatureCollection<SimpleFeatureType, SimpleFeature> collection =
> FeatureCollections
>                                                .newCollection();
>
>                                SimpleFeature feature = SimpleFeatureBuilder.build(ft, attributes,
> SimpleFeatureBuilder.createDefaultFeatureId());
>                                collection.add(feature);
>                                store.addFeatures(collection);
> Note that "geom" is a JTS geometry, and "values" is an Object[].
>
> I've been measuring times, and 99% of the time is spent in the last line:
>
>    store.addFeatures(collection);
>
> Is there a better way to achieve this with GeoTools or should I bypass
> the FeatureStore layer in GeoTools and go directly to ShapefileWriter?
> I would really appreciate any clue on this.
>
> Regards,
>
> César.
>
>
>
> --
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>   César Martínez Izquierdo
>   GIS developer
>   -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
>   ETC-LUSI: http://etc-lusi.eionet.europa.eu/
>   Universitat Autònoma de Barcelona (SPAIN)
> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>



-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   César Martínez Izquierdo
   GIS developer
   -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
   ETC-LUSI: http://etc-lusi.eionet.europa.eu/
   Universitat Autònoma de Barcelona (SPAIN)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -