Some javascript/style in this post has been disabled (
why?)
I need to check/set the
precision on geometries written to shapefile, and am having trouble locating
information about this in the code or documentation.
What prompts this is that
I’m writing MultiPolygon geometries (geographic crs) that are physically
fairly small, so I need to get precision on coordinates out to several decimal
places. While the geometries in the features are showing double precision (out
to many decimal places) before being written to shapefile, when I open the
output shapefile in ArcMap, they seem to have only 2-decimal precision.
I’m just using the
default method of writing shapefiles used by example in the online userguide
(see appended source).
Can anyone point me in the
right direction?
Thanks,
Patrick
public ShapefileDataStore
exportToShapefile( FeatureCollection collection, File directory ) throws
IOException {
SimpleFeatureType
ft = (SimpleFeatureType) collection.getSchema();
String ftName =
ft.getName().toString();
CoordinateReferenceSystem
crs = ft.getCoordinateReferenceSystem();
ftName =
ftName.substring( ftName.lastIndexOf("/")+4 );
File file = new
File( directory, ftName+".shp" );
Map<String,
Serializable> params = new HashMap<String, Serializable>();
params.put("url",
file.toURI().toURL() );
FileDataStoreFactorySpi
factory = new IndexedShapefileDataStoreFactory();
ShapefileDataStore
dataStore = (ShapefileDataStore) factory.createNewDataStore(params);
dataStore.createSchema(ft);
dataStore.forceSchemaCRS(
crs );
FeatureStore
featureStore = (FeatureStore) dataStore.getFeatureSource( ftName );
Transaction t =
new DefaultTransaction();
try {
featureStore.addFeatures(
collection );
t.commit();
// write it out
}
catch(
IOException e){
e.printStackTrace();
try {
t.rollback();
}
catch(
IOException e2 ){
e.printStackTrace();
}
}
finally {
t.close();
}
return
dataStore;
}
__________ Information from ESET NOD32 Antivirus, version of virus signature database 4429 (20090916) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
------------------------------------------------------------------------------
Come build with us! The BlackBerry® Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9-12, 2009. Register now!
http://p.sf.net/sfu/devconf_______________________________________________
Geotools-gt2-users mailing list
[hidden email]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
