Note that we do store the CoordinateReferenceSystem object in the FeatureType (and not the geometry).
See the diagram below for GeometryType and FeatureType - both provide a getCoordinateReferenceSystem() method. - http://docs.geotools.org/latest/userguide/guide/library/opengis/model.html -- Jody Garnett On Thursday, 31 March 2011 at 11:22 AM, Oleksandr Huziy wrote: > Hello, > > I solved the problem with null crs of the feature adding 1 line > > Hints hints = new Hints(); > hints.put(Hints.CRS, re.getCoordinateReferenceSystem()); > geometryFactory = JTSFactoryFinder.getGeometryFactory(hints); > simpleFeatureTypeBuilder.add("geometry", Polygon.class); > simpleFeatureTypeBuilder.setCRS(re.getCoordinateReferenceSystem()); > simpleFeatureTypeBuilder.setName("polygon"); > SimpleFeatureType type = simpleFeatureTypeBuilder.buildFeatureType(); > > type = DataUtilities.createSubType(type, null, DefaultGeographicCRS.WGS84); > > then created the feature as earlier. So now the purpose of hints is not clear. > > > -- > Oleksandr Huziy > > 2011/3/30 Oleksandr Huziy <[email protected]> > > Hello again, > > > > another method I am trying to use to create a polygon is: > > > > Hints hints = new Hints(); > > hints.put(Hints.CRS, DefaultGeographicCRS.WGS84); > > geometryFactory = JTSFactoryFinder.getGeometryFactory(hints); > > simpleFeatureTypeBuilder.add("geometry", Polygon.class); > > simpleFeatureTypeBuilder.setName("polygon"); > > SimpleFeatureType type = simpleFeatureTypeBuilder.buildFeatureType(); > > > > Coordinate[] coords = new Coordinate[5]; > > double x0, y0, dx, dy; > > x0 = re.getMinX(); > > y0 = re.getMinY(); > > dx = re.getWidth(); > > dy = re.getHeight(); > > > > coords[0] = new Coordinate(x0, y0); > > coords[1] = new Coordinate(x0, y0 + dy); > > coords[2] = new Coordinate(x0 + dx, y0 + dy); > > coords[3] = new Coordinate(x0 + dx, y0); > > coords[4] = coords[0]; > > > > > > Polygon polygon = > > geometryFactory.createPolygon(geometryFactory.createLinearRing(coords), > > null); > > SimpleFeature feature = SimpleFeatureBuilder.build( type, new Object[]{ > > polygon }, null); > > > > > > but when I try to access crs of the feature it gives me null (i.e. > > feature.getFeatureType().getCoordinateReferenceSystem()), > > and as a consequence I get the following error while trying to draw it: > > > > Mar 30, 2011 2:08:16 PM org.geotools.map.MapContext getLayerBounds > > SEVERE: It was not possible to get a projected bounds estimate > > > > But it is drawn ok. > > > > And while we are at this, how can I specify bounds of MapContext in > > coordinates, for example, if I want it to have an extent > > -180, 180; -90, 90 ? > > > > thank you very much > > -- > > Oleksandr Huziy > > > > > > > > > > > ------------------------------------------------------------------------------ > Create and publish websites with WebMatrix > Use the most popular FREE web apps or write code yourself; > WebMatrix provides all the features you need to develop and > publish your website. http://p.sf.net/sfu/ms-webmatrix-sf > _______________________________________________ > Geotools-gt2-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users >
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