本文整理了Java中org.locationtech.jts.geom.Geometry.union()方法的一些代码示例，展示了Geometry.union()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.union()方法的具体详情如下：
包路径：org.locationtech.jts.geom.Geometry
类名称：Geometry
方法名：union

Geometry.union介绍

[英]Computes the union of all the elements of this geometry.

This method supports GeometryCollections (which the other overlay operations currently do not).

The result obeys the following contract:

• Unioning a set of LineStrings has the effect of fully noding and dissolving the linework.
• Unioning a set of Polygons always returns a Polygonal geometry (unlike #union(Geometry), which may return geometries of lower dimension if a topology collapse occurred).
  [中]计算此几何图形的所有元素的并集。
  此方法支持GeometryCollection（其他覆盖操作当前不支持）。
  结果符合以下合同：
  *合并一组线串具有完全点头和溶解线条的效果。
  *合并一组多边形始终会返回多边形几何体（与#union（geometry）不同，如果发生拓扑崩溃，则#union（geometry）可能会返回低维几何体）。

代码示例

代码示例来源：origin: geotools/geotools

public static Geometry union(Geometry arg0, Geometry arg1) {
  if (arg0 == null || arg1 == null) return null;
  Geometry _this = arg0;
  return _this.union(arg1);
}

代码示例来源：origin: locationtech/spatial4j

private static Geometry unionGeometryCollection(Geometry geom) {
 if (geom instanceof GeometryCollection) {
  return geom.union();
 }
 return geom;
}

代码示例来源：origin: geotools/geotools

public Geometry union() {
  return geometry.union();
}

代码示例来源：origin: geotools/geotools

public Geometry union(Geometry other) {
  return geometry.union(other);
}

代码示例来源：origin: geotools/geotools

/**
 * Returns true if the geometry covers the entire world
 *
 * @param geometry
 * @return
 */
private boolean isWorld(Literal geometry) {
  if (geometry != null) {
    Geometry g = geometry.evaluate(null, Geometry.class);
    if (g != null) {
      return JTS.toGeometry(WORLD).equalsTopo(g.union());
    }
  }
  return false;
}

代码示例来源：origin: geotools/geotools

@DescribeProcess(
  title = "Union",
  description =
      "Returns a geometry representing all points contained in any of the geometries in a geometry collection."
)
@DescribeResult(description = "Union of input geometries")
public static Geometry union(
    @DescribeParameter(name = "geom", description = "Input geometries (minimum 2)", min = 2)
        Geometry... geoms) {
  Geometry result = null;
  for (Geometry g : geoms) {
    if (result == null) {
      result = g;
    } else {
      result = result.union(g);
    }
  }
  return result;
}

代码示例来源：origin: geotools/geotools

@DescribeProcess(title = "Split Polygon", description = "Splits a polygon by a linestring")
@DescribeResult(description = "The collection of split polygons")
public static Geometry splitPolygon(
    @DescribeParameter(name = "polygon", description = "Polygon to split") Geometry polygon,
    @DescribeParameter(name = "line", description = "Linestring to split by")
        LineString line) {
  Geometry nodedLinework = polygon.getBoundary().union(line);
  Geometry polys = polygonize(nodedLinework);
  // Only keep polygons which are inside the input
  List<Polygon> output = new ArrayList<Polygon>();
  for (int i = 0; i < polys.getNumGeometries(); i++) {
    Polygon candpoly = (Polygon) polys.getGeometryN(i);
    // use interior point to test for inclusion in parent
    if (polygon.contains(candpoly.getInteriorPoint())) {
      output.add(candpoly);
    }
  }
  return polygon.getFactory()
      .createGeometryCollection(GeometryFactory.toGeometryArray(output));
}

代码示例来源：origin: org.n52.sensorweb.sos/hibernate-common

private Geometry mergeGeometries(Geometry geom, List<Object> list) {
  for (Object extent : list) {
    if (extent != null) {
      if (geom == null) {
        geom =  (Geometry) extent;
      } else {
        geom.union((Geometry) extent);
      }
    }
  }
  return geom;
}

代码示例来源：origin: locationtech/jts

private Geometry repeatedUnion(List geoms)
{
  Geometry union = null;
  for (Iterator i = geoms.iterator(); i.hasNext(); ) {
    Geometry g = (Geometry) i.next();
    if (union == null)
      union = g.copy();
    else
      union = union.union(g);
  }
  return union;
}

代码示例来源：origin: locationtech/jts

public static Geometry bufferByComponents(Geometry g, double distance)	
{
  return componentBuffers(g, distance).union();
}

代码示例来源：origin: locationtech/jts

(new FailureChecker() { void operation() {
  b.union(a);
 }  }).check(IllegalArgumentException.class);
}

代码示例来源：origin: locationtech/jts

(new FailureChecker() { void operation() {
  a.union(b);
 }  }).check(IllegalArgumentException.class);

代码示例来源：origin: org.opengeo/geodb

@Override
protected void add(Geometry geometry) {
  if (result == null) {
    result = geometry;
  } else {
    if (geometry != null) {
      result = result.union(geometry.getEnvelope());
    }
  }
}

代码示例来源：origin: locationtech/jts

public static Geometry logoLines(Geometry g)
{
 return create_J(g)
 .union(create_T(g))
 .union(create_S(g));
}

代码示例来源：origin: locationtech/jts

public static Geometry unionUsingGeometryCollection(Geometry a, Geometry b)                 
{   
 Geometry gc = a.getFactory().createGeometryCollection(
   new Geometry[] { a, b});
 return gc.union(); 
}

代码示例来源：origin: locationtech/jts

/**
 * Computes the set-theoretic union of two {@link Geometry}s, using enhanced precision.
 * @param geom0 the first Geometry
 * @param geom1 the second Geometry
 * @return the Geometry representing the set-theoretic union of the input Geometries.
 */
public Geometry union(Geometry geom0, Geometry geom1)
{
 Geometry[] geom = removeCommonBits(geom0, geom1);
 return computeResultPrecision(geom[0].union(geom[1]));
}

代码示例来源：origin: locationtech/jts

public static Geometry invokeGeometryOverlayMethod(int opCode, Geometry g0, Geometry g1)
{
 switch (opCode) {
  case OverlayOp.INTERSECTION: return g0.intersection(g1);
  case OverlayOp.UNION: return g0.union(g1);
  case OverlayOp.DIFFERENCE: return g0.difference(g1);
  case OverlayOp.SYMDIFFERENCE: return g0.symDifference(g1);
 }
 throw new IllegalArgumentException("Unknown overlay op code");
}

代码示例来源：origin: locationtech/jts

public double measure(Geometry g1, Geometry g2)
{        
  double areaInt = g1.intersection(g2).getArea();
  double areaUnion = g1.union(g2).getArea();
  return areaInt / areaUnion;
}

代码示例来源：origin: locationtech/jts

public void testNoding() throws Exception {
 Geometry a = reader.read("LINESTRING(0 0, 100 100)");
 Geometry b = reader.read("LINESTRING(0 100, 100 0)");
 List lineStrings = Arrays.asList(new Object[] {a, b});
 Geometry nodedLineStrings = (LineString) lineStrings.get(0);
 for (int i = 1; i < lineStrings.size(); i++) {
  nodedLineStrings = nodedLineStrings.union((LineString)lineStrings.get(i));
 }
 assertEquals("MULTILINESTRING ((0 0, 50 50), (50 50, 100 100), (0 100, 50 50), (50 50, 100 0))", nodedLineStrings.toString());
}

代码示例来源：origin: locationtech/jts

private Geometry dissolveLines(Geometry lines) {
 Geometry dissolved = lines.union();
 LineMerger merger = new LineMerger();
 merger.add(dissolved);
 Collection mergedColl = merger.getMergedLineStrings();
 Geometry merged = lines.getFactory().buildGeometry(mergedColl);
 return merged;
}