org.locationtech.jts.geom.Geometry.isValid()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.isValid()方法的一些代码示例，展示了Geometry.isValid()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.isValid()方法的具体详情如下：
包路径：org.locationtech.jts.geom.Geometry
类名称：Geometry
方法名：isValid

Geometry.isValid介绍

[英]Tests whether this Geometry is topologically valid, according to the OGC SFS specification.

For validity rules see the Javadoc for the specific Geometry subclass.
[中]根据OGC SFS规范，测试此Geometry是否在拓扑上有效。
有关有效性规则，请参阅特定几何体子类的Javadoc。

代码示例

代码示例来源：origin: geotools/geotools

public static boolean isValid(Geometry arg0) {
  if (arg0 == null) return false;
  Geometry _this = arg0;
  return _this.isValid();
}

代码示例来源：origin: geotools/geotools

public boolean isValid() {
  return geometry.isValid();
}

代码示例来源：origin: geotools/geotools

@DescribeProcess(
  title = "Valid Test",
  description = "Tests if a geometry is topologically valid."
)
@DescribeResult(description = "True if the input is valid")
public static boolean isValid(
    @DescribeParameter(name = "geom", description = "Input geometry") Geometry geom) {
  return geom.isValid();
}

代码示例来源：origin: locationtech/spatial4j

/**
 * This "pages" through standard geo boundaries offset by multiples of 360
 * longitudinally that intersect geom, and the intersecting results of a page
 * and the geom are shifted into the standard -180 to +180 and added to a new
 * geometry that is returned.
 */
private static Geometry cutUnwrappedGeomInto360(Geometry geom) {
 Envelope geomEnv = geom.getEnvelopeInternal();
 if (geomEnv.getMinX() >= -180 && geomEnv.getMaxX() <= 180)
  return geom;
 assert geom.isValid() : "geom";
 //TODO opt: support geom's that start at negative pages --
 // ... will avoid need to previously shift in unwrapDateline(geom).
 List<Geometry> geomList = new ArrayList<Geometry>();
 //page 0 is the standard -180 to 180 range
 for (int page = 0; true; page++) {
  double minX = -180 + page * 360;
  if (geomEnv.getMaxX() <= minX)
   break;
  Geometry rect = geom.getFactory().toGeometry(new Envelope(minX, minX + 360, -90, 90));
  assert rect.isValid() : "rect";
  Geometry pageGeom = rect.intersection(geom);//JTS is doing some hard work
  assert pageGeom.isValid() : "pageGeom";
  shiftGeomByX(pageGeom, page * -360);
  geomList.add(pageGeom);
 }
 return UnaryUnionOp.union(geomList);
}

代码示例来源：origin: mapsforge/mapsforge

if (!geometry.isValid()) {
  if (!geometry.isValid()) {
    LOGGER.warning("invalid geometry even after attempt to fix " + way.getId());
if ((ret instanceof Polygon || ret instanceof MultiPolygon) && !ret.isValid()) {
  LOGGER.warning("clipped way is not valid, trying to repair it: " + way.getId());
  ret = JTSUtils.repairInvalidPolygon(ret);

代码示例来源：origin: geotools/geotools

private static Geometry pointInGeometry(Geometry g) {
  Point p = g.getCentroid();
  if (g instanceof Polygon) {
    // if the geometry is heavily generalized centroid computation may fail and return NaN
    if (Double.isNaN(p.getX()) || Double.isNaN(p.getY()))
      return g.getFactory().createPoint(g.getCoordinate());
    // otherwise let's check if the point is inside. Again, this check and
    // "getInteriorPoint"
    // will work only if the geometry is valid
    if (g.isValid() && !g.contains(p)) {
      try {
        p = g.getInteriorPoint();
      } catch (Exception e) {
        // generalized geometries might make interior point go bye bye
        return p;
      }
    } else {
      return p;
    }
  }
  return p;
}

代码示例来源：origin: mapsforge/mapsforge

@Test
public void testBuildGeometryFromInValidPolygon() {
  // Some of these tests do not really make sense, as not everything that is a closed line
  // should be a polygon in OSM.
  String testfile = "invalid-polygon.wkt";
  // String expectedfile = "invalid-polygon-repaired.wkt";
  List<TDWay> ways = MockingUtils.wktPolygonToWays(testfile);
  Geometry geometry = JTSUtils.toJtsGeometry(ways.get(0), ways.subList(1, ways.size()));
  Assert.isTrue(geometry instanceof LineString);
  Assert.isTrue(geometry.isValid());
}

代码示例来源：origin: mapsforge/mapsforge

@Test
public void testBuildGeometryFromValidPolygon() {
  String testfile = "valid-polygon.wkt";
  List<TDWay> ways = MockingUtils.wktPolygonToWays(testfile);
  Geometry geometry = JTSUtils.toJtsGeometry(ways.get(0), ways.subList(1, ways.size()));
  Assert.isTrue(geometry instanceof LineString);
  Assert.isTrue(geometry.isValid());
}

代码示例来源：origin: mapsforge/mapsforge

@Test
public void testBuildGeometryFromInValidPolygonWithHoles() {
  String testfile = "invalid-polygon-2-inner-rings.wkt";
  String expectedfile = "invalid-polygon-2-inner-rings-repaired.wkt";
  List<TDWay> ways = MockingUtils.wktPolygonToWays(testfile);
  Geometry geometry = JTSUtils.toJtsGeometry(ways.get(0), ways.subList(1, ways.size()));
  Assert.isTrue(geometry instanceof Polygon);
  Assert.isTrue(geometry.isValid());
  Geometry expected = MockingUtils.readWKTFile(expectedfile);
  Assert.equals(expected, geometry);
}

代码示例来源：origin: geotools/geotools

if (!geom.isValid()) {
  String message = "Not a valid geometry. isValid() failed";
  LOGGER.log(Level.FINEST, getName() + "(" + feature.getID() + "):" + message);

代码示例来源：origin: geotools/geotools

boolean isValid = g.isValid();
} else if (roi instanceof ROIGeometry) {
  g = ((ROIGeometry) roi).getAsGeometry();
  isValid = g.isValid();
  if (!isValid) {
    double tol = GeometrySnapper.computeOverlaySnapTolerance(g);

代码示例来源：origin: geotools/geotools

private Geometry simpleOffsetTest(Geometry geom, final double offsetDistance) {
  Geometry offset = offset(geom, offsetDistance);
  assertTrue(offset.isValid());
  assertTrue(offset.getLength() > 0);
  assertEquals(abs(offsetDistance), offset.distance(geom), EPS * abs(offsetDistance));

代码示例来源：origin: geotools/geotools

@Test
public void testSelfIntersectRight() throws Exception {
  Geometry geom = geometry("LINESTRING(0 0, 10 0, 10 -10, 3 -10, 3 3)");
  Geometry offset = offset(geom, -1);
  assertTrue(offset.isValid());
  assertTrue(offset.getLength() > 0);
  // the offset line intersects the original one, because it's also self intersecting, so we
  // cannot have this test
  // assertEquals(2, offset.distance(geom), EPS);
  assertEquals(geometry("LINESTRING (0 -1, 9 -1, 9 -9, 4 -9, 4 3)"), offset);
}

代码示例来源：origin: geotools/geotools

} catch (TopologyException e) {
  try {
    if (((g instanceof Polygon) || (g instanceof MultiPolygon)) && (!g.isValid())) {

代码示例来源：origin: geotools/geotools

@Test
public void testElongatedLoopGenerator() throws Exception {
  Geometry geom = geometry("LINESTRING(0 0, 5 0, 5 -10, 7 -10, 7 0,  10 0)");
  Geometry offset = offset(geom, 1.5);
  assertTrue(offset.isValid());
  assertTrue(offset.getLength() > 0);
  // this one "fails", but the output cannot be really called wrong anymore, if we are trying
  // to
  // offset a road at least
  Geometry expected =
      geometry(
          "LINESTRING (0 1.5, 5 1.5, 5.260472266500395 1.477211629518312, 5.513030214988503 1.4095389311788626, 5.75 1.299038105676658, 5.964181414529809 1.149066664678467, 6.149066664678467 0.9641814145298091, 6.299038105676658 0.7500000000000002, 6.409538931178862 0.5130302149885032, 6.477211629518312 0.2604722665003956, 6.5 0.0000000000000001, 6.5 -8.5, 5.5 -8.5, 5.5 0.0000000000000001, 5.522788370481688 0.2604722665003956, 5.590461068821138 0.5130302149885032, 5.700961894323342 0.7499999999999998, 5.850933335321533 0.9641814145298091, 6.035818585470191 1.149066664678467, 6.25 1.299038105676658, 6.486969785011497 1.4095389311788624, 6.739527733499605 1.477211629518312, 7 1.5, 10 1.5)");
  assertTrue(expected.equalsExact(offset, 0.1));
}

代码示例来源：origin: geotools/geotools

@Test
public void testSelfIntersectLeft() throws Exception {
  Geometry geom = geometry("LINESTRING(0 0, 10 0, 10 -10, 3 -10, 3 3)");
  Geometry offset = offset(geom, 2);
  assertTrue(offset.isValid());
  assertTrue(offset.getLength() > 0);
  // the offset line intersects the original one, because it's also self intersecting, so we
  // cannot have this test
  // assertEquals(2, offset.distance(geom), EPS);
  Geometry expected =
      geometry(
          "LINESTRING (0 2, 10 2, 10.34729635533386 1.969615506024416, 10.684040286651337 1.8793852415718169, 11 1.7320508075688774, 11.28557521937308 1.532088886237956, 11.532088886237956 1.2855752193730787, 11.732050807568877 1.0000000000000002, 11.879385241571816 0.6840402866513376, 11.969615506024416 0.3472963553338608, 12 0.0000000000000001, 12 -10, 11.969615506024416 -10.34729635533386, 11.879385241571818 -10.684040286651337, 11.732050807568877 -11, 11.532088886237956 -11.28557521937308, 11.28557521937308 -11.532088886237956, 11 -11.732050807568877, 10.684040286651339 -11.879385241571816, 10.34729635533386 -11.969615506024416, 10 -12, 2.9999999999999996 -12, 2.6527036446661394 -11.969615506024416, 2.3159597133486622 -11.879385241571816, 2 -11.732050807568877, 1.714424780626921 -11.532088886237956, 1.467911113762044 -11.28557521937308, 1.2679491924311228 -11, 1.1206147584281831 -10.684040286651337, 1.030384493975584 -10.34729635533386, 1 -10, 1 3)");
  assertTrue(expected.equalsExact(offset, 0.1));
}

代码示例来源：origin: geotools/geotools

@Test
public void testWrapGeometryLatLonMultipleTimes() throws Exception {
  ReferencedEnvelope renderingEnvelope =
      new ReferencedEnvelope(-90, 90, -580, 540, ED50_LATLON);
  // a geometry close to the dateline
  Geometry g = new WKTReader().read("POLYGON((-74 -33, -29 -33, -29 5, -74 5, -74 -33))");
  // make sure the geometry is not wrapped, but it is preserved
  ProjectionHandler handler =
      ProjectionHandlerFinder.getHandler(renderingEnvelope, WGS84, true);
  assertTrue(handler.requiresProcessing(g));
  Geometry preProcessed = handler.preProcess(g);
  MathTransform mt = handler.getRenderingTransform(CRS.findMathTransform(WGS84, ED50_LATLON));
  Geometry transformed = JTS.transform(preProcessed, mt);
  // post process (provide identity transform to force wrap heuristic)
  Geometry postProcessed = handler.postProcess(mt, transformed);
  assertTrue(postProcessed.isValid());
  // should have been replicated three times
  assertEquals(3, postProcessed.getNumGeometries());
}

代码示例来源：origin: geotools/geotools

@Test
public void testWrapAnctartica() throws Exception {
  ReferencedEnvelope world = new ReferencedEnvelope(-80, 80, -180, 180, ED50_LATLON);
  // make sure the geometry is not wrapped, but it is preserved
  ProjectionHandler handler = ProjectionHandlerFinder.getHandler(world, WGS84, true);
  // a geometry that will cross the dateline and sitting in the same area as the
  // rendering envelope (with wgs84 lon/latcoordinates)
  String wkt = "POLYGON((180 -90, 180 90, -180 90, -180 -90, 180 -90))";
  Geometry g = new WKTReader().read(wkt);
  MathTransform mt = CRS.findMathTransform(WGS84, ED50_LATLON);
  MathTransform prepared = handler.getRenderingTransform(mt);
  assertTrue(handler.requiresProcessing(g));
  Geometry preProcessed = handler.preProcess(g);
  Geometry reprojected = JTS.transform(preProcessed, prepared);
  assertTrue(reprojected.isValid());
  reprojected.apply(
      new CoordinateFilter() {
        @Override
        public void filter(Coordinate coord) {
          assertEquals(90.0, Math.abs(coord.getOrdinate(0)), 0.1);
          assertEquals(180.0, Math.abs(coord.getOrdinate(1)), 5);
        }
      });
  // post process, this should wrap the geometry, make sure it's valid, and avoid large jumps
  // in its border
  Geometry postProcessed = handler.postProcess(prepared, reprojected);
  assertThat(postProcessed, CoreMatchers.instanceOf(MultiPolygon.class));
  assertEquals(2, postProcessed.getNumGeometries());
}

代码示例来源：origin: locationtech/jts

public GeometryOperationValidator testValid() throws Exception {
  Assert.assertTrue("simplified geometry is not valid", ioGeometry[1]
      .isValid());
  return this;
}

代码示例来源：origin: locationtech/jts

public void checkValid(String name, Geometry g)
{
 System.out.println("Running " + name);
 Stopwatch sw = new Stopwatch();
 boolean isValid = g.isValid();
 System.out.println("Is Valid = " + isValid 
   + "           Time: " + sw.getTimeString() );
}

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