org.locationtech.jts.geom.Geometry.getCentroid()方法的使用及代码示例

x33g5p2x  于2022-01-19 转载在 其他  
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本文整理了Java中org.locationtech.jts.geom.Geometry.getCentroid()方法的一些代码示例，展示了Geometry.getCentroid()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Geometry.getCentroid()方法的具体详情如下：
包路径：org.locationtech.jts.geom.Geometry
类名称：Geometry
方法名：getCentroid

Geometry.getCentroid介绍

[英]Computes the centroid of this Geometry. The centroid is equal to the centroid of the set of component Geometries of highest dimension (since the lower-dimension geometries contribute zero "weight" to the centroid).

The centroid of an empty geometry is POINT EMPTY.
[中]计算此Geometry的质心。质心等于最高尺寸组件几何图形集的质心（因为较低尺寸几何图形对质心的“权重”为零）。
空几何体的质心为POINT EMPTY。

代码示例

代码示例来源：origin: geotools/geotools

  1. public static Geometry centroid(Geometry arg0) {
  2.   if (arg0 == null) return null;
  3.   Geometry _this = arg0;
  4.   return _this.getCentroid();
  5. }

代码示例来源：origin: geotools/geotools

  1. public Point getCentroid() {
  2.   return geometry.getCentroid();
  3. }

代码示例来源：origin: geotools/geotools

  1. public Point toPoint() {
  2.   Geometry geometry = toGeometry();
  3.   return geometry.getCentroid();
  4. }

代码示例来源：origin: geotools/geotools

  1. public Object evaluate(Object feature) {
  2.     Geometry arg0;
  4.     try { // attempt to get value and perform conversion
  5.       arg0 = (Geometry) getExpression(0).evaluate(feature);
  6.     } catch (Exception e) // probably a type error
  7.     {
  8.       throw new IllegalArgumentException(
  9.           "Filter Function problem for function getZ argument #0 - expected type Geometry");
  10.     }
  12.     return new Double(arg0.getCentroid().getCoordinate().z);
  13.   }
  14. }

代码示例来源：origin: geotools/geotools

  1. /**
  2.  * Gets a point to represent the Geometry. If the Geometry is a point, this is returned.
  3.  * Otherwise, the centroid is used.
  4.  *
  5.  * @param g the geometry to find a point for
  6.  * @return a point representing the Geometry
  7.  */
  8. private static Coordinate getPoint(Geometry g) {
  9.   if (g.getNumPoints() == 1) return g.getCoordinate();
  10.   return g.getCentroid().getCoordinate();
  11. }

代码示例来源：origin: geotools/geotools

  1. /**
  2.  * Gets a point to represent the Geometry. If the Geometry is a point, this is returned.
  3.  * Otherwise, the centroid is used.
  4.  *
  5.  * @param g the geometry to find a point for
  6.  * @return a point representing the Geometry
  7.  */
  8. private static Coordinate getRepresentativePoint(Geometry g) {
  9.   if (g.getNumPoints() == 1) return g.getCoordinate();
  10.   return g.getCentroid().getCoordinate();
  11. }

代码示例来源：origin: geotools/geotools

  1. @DescribeProcess(
  2.   title = "Centroid",
  3.   description =
  4.       "Returns the geometric centroid of a geometry. Output is a single point.  The centroid point may be located outside the geometry."
  5. )
  6. @DescribeResult(description = "Centroid of the input geometry")
  7. public static Geometry centroid(
  8.     @DescribeParameter(name = "geom", description = "Input geometry") Geometry geom) {
  9.   return geom.getCentroid();
  10. }

代码示例来源：origin: mapsforge/mapsforge

  1. /**
  2.  * @param geometry the JTS {@link Geometry} object
  3.  * @return the centroid of the given geometry
  4.  */
  5. public static LatLong computeCentroid(Geometry geometry) {
  6.   Point centroid = geometry.getCentroid();
  7.   if (centroid != null) {
  8.     return new LatLong(centroid.getCoordinate().y, centroid.getCoordinate().x);
  9.   }
  10.   return null;
  11. }

代码示例来源：origin: geotools/geotools

  1. if (!((g instanceof Point) || (g instanceof MultiPoint))) // handle
  2.   g = g.getCentroid(); // will be point
  3. if (g instanceof Point) {
  4.   Point point = (Point) g;

代码示例来源：origin: locationtech/spatial4j

  1. @Override
  2. public JtsPoint getCenter() {
  3.  if (isEmpty()) //geom.getCentroid == null
  4.   return new JtsPoint(ctx.getGeometryFactory().createPoint((Coordinate)null), ctx);
  5.  return new JtsPoint(geom.getCentroid(), ctx);
  6. }

代码示例来源：origin: geotools/geotools

  1. public SimpleFeature next() throws NoSuchElementException {
  2.     SimpleFeature f = delegate.next();
  3.     for (Object attribute : f.getAttributes()) {
  4.       if ((attribute instanceof Geometry) && !(attribute instanceof Point)) {
  5.         attribute = ((Geometry) attribute).getCentroid();
  6.       }
  7.       fb.add(attribute);
  8.     }
  9.     return fb.buildFeature(f.getID());
  10.   }
  11. }

代码示例来源：origin: geotools/geotools

  1. /**
  2.  * Returns the center of the reference geometry of the distance buffer operator, in case
  3.  *
  4.  * @param operator
  5.  * @return
  6.  */
  7. protected Coordinate getReferenceGeometryCentroid(DistanceBufferOperator operator) {
  8.   Geometry geom = operator.getExpression1().evaluate(null, Geometry.class);
  9.   if (geom == null) {
  10.     geom = operator.getExpression2().evaluate(null, Geometry.class);
  11.   }
  12.   if (geom == null) {
  13.     return null;
  14.   }
  15.   return geom.getCentroid().getCoordinate();
  16. }

代码示例来源：origin: geotools/geotools

  1. private static Geometry pointInGeometry(Geometry g) {
  2.   Point p = g.getCentroid();
  3.   if (g instanceof Polygon) {
  4.     // if the geometry is heavily generalized centroid computation may fail and return NaN
  5.     if (Double.isNaN(p.getX()) || Double.isNaN(p.getY()))
  6.       return g.getFactory().createPoint(g.getCoordinate());
  7.     // otherwise let's check if the point is inside. Again, this check and
  8.     // "getInteriorPoint"
  9.     // will work only if the geometry is valid
  10.     if (g.isValid() && !g.contains(p)) {
  11.       try {
  12.         p = g.getInteriorPoint();
  13.       } catch (Exception e) {
  14.         // generalized geometries might make interior point go bye bye
  15.         return p;
  16.       }
  17.     } else {
  18.       return p;
  19.     }
  20.   }
  21.   return p;
  22. }

代码示例来源：origin: geotools/geotools

  1. + source.toString()
  2.           + " to Point. This could be unsafe");
  3. destGeometry = ((Geometry) source).getCentroid();

代码示例来源：origin: geotools/geotools

  1. } else {
  2.   geom = geom.getCentroid();

代码示例来源：origin: mapsforge/mapsforge

  1. } else {
  2.   LOGGER.warning("Failed to get label for geometry: " + geometry);
  3.   return geometry.getCentroid();

代码示例来源：origin: geotools/geotools

  1. public DelaunayNode[] featuresToNodes(SimpleFeatureCollection fc) {
  2.   SimpleFeatureIterator iter = fc.features();
  3.   int size = fc.size();
  4.   DelaunayNode[] nodes = new DelaunayNode[size];
  5.   int index = 0;
  6.   while (iter.hasNext()) {
  7.     SimpleFeature next = iter.next();
  8.     Geometry geom = (Geometry) next.getDefaultGeometry();
  9.     Point centroid;
  10.     if (geom instanceof Point) {
  11.       centroid = (Point) geom;
  12.     } else {
  13.       centroid = geom.getCentroid();
  14.     }
  15.     DelaunayNode node = new DelaunayNode();
  16.     node.setCoordinate(centroid.getCoordinate());
  17.     node.setFeature(next);
  18.     if (!(arrayContains(node, nodes, index))) {
  19.       nodes[index] = node;
  20.       index++;
  21.     }
  22.   }
  23.   DelaunayNode[] trimmed = new DelaunayNode[index];
  24.   for (int i = 0; i < index; i++) {
  25.     trimmed[i] = nodes[i];
  26.   }
  27.   return trimmed;
  28. }

代码示例来源：origin: geotools/geotools

  1. public static DelaunayNode[] featureCollectionToNodeArray(SimpleFeatureCollection fc) {
  2.   SimpleFeatureIterator iter = fc.features();
  3.   int size = fc.size();
  4.   DelaunayNode[] nodes = new DelaunayNode[size];
  5.   int index = 0;
  6.   while (iter.hasNext()) {
  7.     SimpleFeature next = iter.next();
  8.     Geometry geom = (Geometry) next.getDefaultGeometry();
  9.     Point centroid;
  10.     if (geom instanceof Point) {
  11.       centroid = (Point) geom;
  12.     } else {
  13.       centroid = geom.getCentroid();
  14.     }
  15.     DelaunayNode node = new DelaunayNode();
  16.     node.setCoordinate(centroid.getCoordinate());
  17.     node.setFeature(next);
  18.     if (!(arrayContains(node, nodes, index))) {
  19.       nodes[index] = node;
  20.       index++;
  21.     }
  22.   }
  23.   DelaunayNode[] trimmed = new DelaunayNode[index];
  24.   for (int i = 0; i < index; i++) {
  25.     trimmed[i] = nodes[i];
  26.   }
  27.   return trimmed;
  28. }

代码示例来源：origin: locationtech/jts

  1. public InteriorPointPoint(Geometry g)
  2. {
  3.  centroid = g.getCentroid().getCoordinate();
  4.  add(g);
  5. }

代码示例来源：origin: locationtech/jts

  1. public InteriorPointLine(Geometry g)
  2. {
  3.  centroid = g.getCentroid().getCoordinate();
  4.  addInterior(g);
  5.  if (interiorPoint == null)
  6.   addEndpoints(g);
  7. }

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