Hello,
Sounds like you need to generate the .prj file with the projection. That
means you are going to have to create a CRS and set it on the Geometry
attribute type.
/* AttributeTypes, starting with Geometry using pre-made CRS */
GeometryAttributeType ptGA =
(GeometryAttributeType)
AttributeTypeFactory.newAttributeType(
"the_geom",
ptG.getClass(),
true,
1,
null,
org.geotools.referencing.crs.DefaultGeographicCRS.WGS84);
or some such.
I presume the shapefile data store will dump this to a .prj file. If not
the .prj file is simply a WKT representation of the CRS so a simple
toString() on the CRS will give you the data you need to put in the
file.
--adrian
On Fri, 2006-12-15 at 17:24 -0200, Paulo Manabe wrote:
> Hi group, last week I sent a message about how to create a new shapefile, I
> do this with this code:
>
>
> AttributeType[] types = new AttributeType[2];
>
> GeometryFactory geomFac = new GeometryFactory();
>
> //simpleline
> Coordinate[] linestringCoordinates = new Coordinate[7];
> linestringCoordinates[0] = new Coordinate(5.0d,5.0d);
> linestringCoordinates[1] = new Coordinate(6.0d,5.0d);
> linestringCoordinates[2] = new Coordinate(6.0d,6.0d);
> linestringCoordinates[3] = new Coordinate(7.0d,6.0d);
> linestringCoordinates[4] = new Coordinate(7.0d,7.0d);
> linestringCoordinates[5] = new Coordinate(8.0d,7.0d);
> linestringCoordinates[6] = new Coordinate(8.0d,8.0d);
> LineString line = geomFac.createLineString(linestringCoordinates);
>
> types[0] = AttributeTypeFactory.newAttributeType("centerline",
> line.getClass());
> types[1] = AttributeTypeFactory.newAttributeType("name", String.class);
> FeatureType lineType = FeatureTypes.newFeatureType(types,
> "linefeature");
> Feature lineFeature = lineType.create(new Object[]{line, "centerline"});
>
>
> //simple polygon
> Coordinate[] polygonCoordinates = new Coordinate[10];
> polygonCoordinates[0] = new Coordinate(7,7);
> polygonCoordinates[1] = new Coordinate(6,9);
> polygonCoordinates[2] = new Coordinate(6,11);
> polygonCoordinates[3] = new Coordinate(7,12);
> polygonCoordinates[4] = new Coordinate(9,11);
> polygonCoordinates[5] = new Coordinate(11,12);
> polygonCoordinates[6] = new Coordinate(13,11);
> polygonCoordinates[7] = new Coordinate(13,9);
> polygonCoordinates[8] = new Coordinate(11,7);
> polygonCoordinates[9] = new Coordinate(7,7);
> LinearRing ring = geomFac.createLinearRing(polygonCoordinates);
> Polygon polygon = geomFac.createPolygon(ring,null);
>
> types[0] = AttributeTypeFactory.newAttributeType("edge",
> polygon.getClass());
> types[1] = AttributeTypeFactory.newAttributeType("name", String.class);
> FeatureType polygonType =
> FeatureTypes.newFeatureType(types,"polygonfeature");
>
> Feature polygonFeature = polygonType.create(new Object[]{polygon,
> "edge"});
>
>
> //simple point
> Coordinate c = new Coordinate(14.0d,14.0d);
> Point point = geomFac.createPoint(c);
> types[0] = AttributeTypeFactory.newAttributeType("centre",
> point.getClass());
> types[1] = AttributeTypeFactory.newAttributeType("name", String.class);
> FeatureType pointType =
> FeatureTypes.newFeatureType(types,"pointfeature");
>
> Feature pointFeature = pointType.create(new Object[]{point, "centre"});
>
>
> //memory store
> MemoryDataStore data = new MemoryDataStore();
> data.addFeature(lineFeature);
> data.addFeature(polygonFeature);
> data.addFeature(pointFeature);
>
>
> String folder= "D:\\Shapes_LFPR\\Lote 05";
> URL shape = new File(folder+ "\\apr.dbf").toURL();
> String newStoreURLString =
>
> shape.toString().substring(0,shape.toString().lastIndexOf("/") + 1)
> + "test_" +
>
> shape.toString().substring(shape.toString().lastIndexOf("/") + 1);
>
> ShapefileDataStore newShapefileDataStore =
> new ShapefileDataStore(new URL(newStoreURLString));
>
> newShapefileDataStore.createSchema(data.getSchema("linefeature"));
>
> FeatureSource newFeatureSource =
> newShapefileDataStore.getFeatureSource("linefeature");
>
> FeatureStore newFeatureStore = (FeatureStore)newFeatureSource;
>
> Transaction t = newFeatureStore.getTransaction();
>
> FeatureResults fsFilteredShape = newFeatureSource.getFeatures();
>
> FeatureReader filteredReader = fsFilteredShape.reader();
>
> newFeatureStore.addFeatures(filteredReader);
>
> t.commit();
> t.close();
>
> System.out.println("Shapefile created");
>
> This code generated 3 files : test_apr.dbf, test_apr.shp and test_apr.shx.
> but, when I open this shapefile in a GIS program, like ArcGis, it throws the
> following error: "One or more layers is missing spatial reference
> information. Data from those layers cannot be projected."
>
> How can I set the spatial reference on this test code?
>
>
>
>
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