Examples of com.vividsolutions.jts.geom.Geometry

com.vividsolutions.jts.geom.Geometry
The base class for all geometric objects.

Binary Predicates
Because it is not clear at this time what semantics for spatial analysis methods involving GeometryCollections would be useful, GeometryCollections are not supported as arguments to binary predicates (other than convexHull) or the relate method.
Set-Theoretic Methods
The spatial analysis methods will return the most specific class possible to represent the result. If the result is homogeneous, a Point, LineString, or Polygon will be returned if the result contains a single element; otherwise, a MultiPoint, MultiLineString, or MultiPolygon will be returned. If the result is heterogeneous a GeometryCollection will be returned.
Because it is not clear at this time what semantics for set-theoretic methods involving GeometryCollections would be useful, GeometryCollections are not supported as arguments to the set-theoretic methods.
Representation of Computed Geometries
The SFS states that the result of a set-theoretic method is the "point-set" result of the usual set-theoretic definition of the operation (SFS 3.2.21.1). However, there are sometimes many ways of representing a point set as a Geometry.
The SFS does not specify an unambiguous representation of a given point set returned from a spatial analysis method. One goal of JTS is to make this specification precise and unambiguous. JTS will use a canonical form for Geometrys returned from spatial analysis methods. The canonical form is a Geometry which is simple and noded:
- Simple means that the Geometry returned will be simple according to the JTS definition of isSimple.
- Noded applies only to overlays involving LineStrings. It means that all intersection points on LineStrings will be present as endpoints of LineStrings in the result.
This definition implies that non-simple geometries which are arguments to spatial analysis methods must be subjected to a line-dissolve process to ensure that the results are simple.
Constructed Points And The Precision Model
The results computed by the set-theoretic methods may contain constructed points which are not present in the input Geometry s. These new points arise from intersections between line segments in the edges of the input Geometrys. In the general case it is not possible to represent constructed points exactly. This is due to the fact that the coordinates of an intersection point may contain twice as many bits of precision as the coordinates of the input line segments. In order to represent these constructed points explicitly, JTS must truncate them to fit the PrecisionModel.
Unfortunately, truncating coordinates moves them slightly. Line segments which would not be coincident in the exact result may become coincident in the truncated representation. This in turn leads to "topology collapses" -- situations where a computed element has a lower dimension than it would in the exact result.
When JTS detects topology collapses during the computation of spatial analysis methods, it will throw an exception. If possible the exception will report the location of the collapse.
#equals(Object) and #hashCode are not overridden, so that when two topologically equal Geometries are added to HashMaps and HashSets, they remain distinct. This behaviour is desired in many cases. @version 1.7

      if (null != oldFeature) {
        // get original geometry from storage to assure not changed by transformation and available
        Object feature = layer.read(oldFeature.getId());
        context.put(PipelineCode.FEATURE_DATA_OBJECT_KEY, feature); // put in context to prevent getting twice
        FeatureModel featureModel = layer.getFeatureModel();
        Geometry oldGeometry = featureModel.getGeometry(feature);
        if (null != oldGeometry) {
          // invalidate
          recorder.record("layer", "Invalidate geometry for old version of feature");
          Envelope oldEnvelope = oldGeometry.getEnvelopeInternal();
          log.debug("invalidate old feature area {}", oldEnvelope);
          cacheManager.invalidate(layer, oldEnvelope);
        }
      }


      // invalidate area for new feature
      InternalFeature feature = context.get(PipelineCode.FEATURE_KEY, InternalFeature.class);
      Geometry geometry = feature.getGeometry();
      if (null != geometry) {
        recorder.record("layer", "Invalidate geometry for new feature");
        Envelope envelope = geometry.getEnvelopeInternal();
        log.debug("invalidate new feature area {}", envelope);
        cacheManager.invalidate(layer, envelope);
      }
    } catch (Throwable t) { //NOPMD
      // have to prevent caching code from making the pipeline fail, log and discard errors

View Full Code Here

              //  layer.delete(oldFeature.getId());
              //} else {
              //  throw new GeomajasSecurityException(ExceptionCode.FEATURE_DELETE_PROHIBITED,
              //      oldFeature.getId(), securityContext.getUserId());
              //}
              Geometry geometry = layer.getFeatureModel().getGeometry(featureObj);
              if (null != geometry) {
                recorder.record("layer", "Invalidate geometry for deleted feature");
                cacheManager.invalidate(layer, geometry.getEnvelopeInternal());
              }
            }
          } else {
            throw new GeomajasSecurityException(ExceptionCode.FEATURE_DELETE_PROHIBITED,
                oldFeature.getId(), securityContext.getUserId());

View Full Code Here

      return "BBOX (" + propertyName + "," + coordinates + ")";
    } else if (spatialOps instanceof BinarySpatialOpTypeInfo) {
      BinarySpatialOpTypeInfo binary = (BinarySpatialOpTypeInfo) spatialOps;
      String propertyName = binary.getPropertyName().getValue();
      if (binary.ifGeometry()) {
        Geometry geometry = null;
        WKTWriter writer = new WKTWriter();
        GeometryFactory factory = new GeometryFactory();
        AbstractGeometryInfo geom = binary.getGeometry();
        geometry = toGeometry(factory, geom);
        String wkt = writer.write(geometry);
        if (binary instanceof ContainsInfo) {
          return "CONTAINS(" + propertyName + "," + wkt + ")";
        } else if (binary instanceof CrossesInfo) {
          return "CROSSES(" + propertyName + "," + wkt + ")";
        } else if (binary instanceof DisjointInfo) {
          return "DISJOINT(" + propertyName + "," + wkt + ")";
        } else if (binary instanceof EqualsInfo) {
          return "EQUALS(" + propertyName + "," + wkt + ")";
        } else if (binary instanceof IntersectsInfo) {
          return "INTERSECTS(" + propertyName + "," + wkt + ")";
        } else if (binary instanceof OverlapsInfo) {
          return "OVERLAPS(" + propertyName + "," + wkt + ")";
        } else if (binary instanceof TouchesInfo) {
          return "TOUCHES(" + propertyName + "," + wkt + ")";
        } else if (binary instanceof WithinInfo) {
          return "WITHIN(" + propertyName + "," + wkt + ")";
        }
      } else if (spatialOps instanceof DistanceBufferTypeInfo) {
        DistanceBufferTypeInfo distanceBuffer = (DistanceBufferTypeInfo) spatialOps;
        AbstractGeometryInfo geom = distanceBuffer.getGeometry();
        GeometryFactory factory = new GeometryFactory();
        Geometry geometry = toGeometry(factory, geom);
        WKTWriter writer = new WKTWriter();
        String wkt = writer.write(geometry);
        String units = distanceBuffer.getDistance().getUnits();
        String distance = distanceBuffer.getDistance().getValue();
        if (distanceBuffer instanceof DWithinInfo) {

View Full Code Here

    }
    return null;
  }


  private Geometry toGeometry(GeometryFactory factory, AbstractGeometryInfo geom) {
    Geometry geometry = null;
    if (geom instanceof AbstractGeometryCollectionInfo) {
      AbstractGeometryCollectionInfo geomCollection = (AbstractGeometryCollectionInfo) geom;
      List<GeometryMemberInfo> members = geomCollection.getGeometryMemberList();
      if (geom instanceof MultiPointInfo) {
        Point[] points = new Point[members.size()];

View Full Code Here

    }
    return geometry;
  }


  private Geometry toSimpleGeometry(GeometryFactory factory, AbstractGeometryInfo geom) {
    Geometry geometry = null;
    if (geom instanceof PointTypeInfo) {
      PointTypeInfo point = (PointTypeInfo) geom;
      if (point.ifCoord()) {
        geometry = factory.createPoint(getCoordinates(Collections.singletonList(point.getCoord()))[0]);
      } else if (point.ifCoordinates()) {

View Full Code Here


      int count = 0;
      while (it.hasNext()) {
        log.debug("process feature");
        Object featureObj = it.next();
        Geometry geometry = layer.getFeatureModel().getGeometry(featureObj);
        InternalFeature feature = convertFeature(featureObj, geometry, layer, transformation,
            styleFilters, style.getLabelStyle(), featureIncludes);
        if (null != feature) {
          count++;
          if (count > offset) {
            features.add(feature);


            if (null != geometry) {
              Envelope envelope = geometry.getEnvelopeInternal();
              if (null == bounds) {
                bounds = new Envelope();
              }
              bounds.expandToInclude(envelope);
            }

View Full Code Here

        }
      }


      // If allowed, add the geometry (transformed!) to the InternalFeature:
      if ((featureIncludes & VectorLayerService.FEATURE_INCLUDE_GEOMETRY) != 0) {
        Geometry transformed;
        if (null != transformation) {
          transformed = geoService.transform(geometry, transformation);
        } else {
          transformed = geometry;
        }

View Full Code Here

      throw new LayerException(e);
    }
  }


  public Geometry getGeometry(Object feature) throws LayerException {
    Geometry geometry = (Geometry) asFeature(feature).getDefaultGeometry();
    geometry.setSRID(srid);
    return (Geometry) geometry.clone();
  }

View Full Code Here

    List<InternalFeature> oldFeatures;
    List<InternalFeature> newFeatures;
    InternalFeature feature;
    CoordinateReferenceSystem crs = beanLayer.getCrs();
    GeometryFactory geometryFactory = new GeometryFactory(new PrecisionModel());
    Geometry geometry;


    login("marino");
    oldFeatures = new ArrayList<InternalFeature>();
    newFeatures = new ArrayList<InternalFeature>();
    feature = converterService.toInternal(new Feature());

View Full Code Here

  public int getSrid() throws LayerException {
    return srid;
  }


  public Geometry getGeometry(Object feature) throws LayerException {
    Geometry geom = (Geometry) asFeature(feature).getDefaultGeometry();
    if (geom instanceof MultiLineString && vectorLayerInfo.getLayerType() == LayerType.LINESTRING) {
      return (Geometry) geom.getGeometryN(0).clone();
    } else if (geom instanceof MultiPolygon && vectorLayerInfo.getLayerType() == LayerType.POLYGON) {
      return (Geometry) geom.getGeometryN(0).clone();
    } else if (geom instanceof MultiPoint && vectorLayerInfo.getLayerType() == LayerType.POINT) {
      return (Geometry) geom.getGeometryN(0).clone();
    }
    return (Geometry) geom.clone();
  }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of com.vividsolutions.jts.geom.Geometry

edu.isi.karma.geospatial.SpatialReferenceSystemTransformationUtil

es.udig.tools.geometry.split.RingExtractorTest

es.udig.tools.geometry.split.SplitBuilderTest

es.udig.tools.geometry.split.SplitMultiPolygonTest

es.udig.tools.geometry.split.SplitStrategyTest

es.udig.tools.geometry.split.SplitTestUtil

es.udig.tools.geometry.split.Testcatalog_20100414

org.exist.indexing.spatial.GMLHSQLIndexWorker

org.geotools.arcsde.data.SpatialFilterTest

org.geotools.coverage.processing.operation.Crop

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of com.vividsolutions.jts.geom.Geometry

Binary Predicates

Set-Theoretic Methods

Representation of Computed Geometries

Constructed Points And The Precision Model

Related Classes of com.vividsolutions.jts.geom.Geometry