com.vividsolutions.jts.geom.Point.buffer()方法的使用及代码示例

x33g5p2x  于2022-01-26 转载在 其他  
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本文整理了Java中com.vividsolutions.jts.geom.Point.buffer()方法的一些代码示例，展示了Point.buffer()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。Point.buffer()方法的具体详情如下：
包路径：com.vividsolutions.jts.geom.Point
类名称：Point
方法名：buffer

Point.buffer介绍

暂无

代码示例

代码示例来源：origin: opentripplanner/OpenTripPlanner

/**
 * Creates a circle shape, using the JTS buffer algorithm. The method is used when there is no street found within the given traveltime, e.g. when
 * the pointer is placed on a field or in the woods.<br>
 * TODO: Note it is actually not correct to do buffer calculation in Euclidian 2D, since the resulting shape will be elliptical when projected.
 * 
 * @param dropPoint the location given by the user
 * @param pathToStreet the path from the dropPoint to the street, used to retrieve the buffer distance
 * @return a Circle
 */
private Geometry createCirle(Coordinate dropPoint, LineString pathToStreet) {
  double length = pathToStreet.getLength();
  GeometryFactory gf = new GeometryFactory();
  Point dp = gf.createPoint(dropPoint);
  Geometry buffer = dp.buffer(length);
  return buffer;
}

代码示例来源：origin: com.vividsolutions/jts

/**
 * Gets a geometry which represents the Minimum Bounding Circle.
 * If the input is degenerate (empty or a single unique point),
 * this method will return an empty geometry or a single Point geometry.
 * Otherwise, a Polygon will be returned which approximates the 
 * Minimum Bounding Circle. 
 * (Note that because the computed polygon is only an approximation, 
 * it may not precisely contain all the input points.)
 * 
 * @return a Geometry representing the Minimum Bounding Circle.
 */
public Geometry getCircle()
{
  //TODO: ensure the output circle contains the extermal points.
  //TODO: or maybe even ensure that the returned geometry contains ALL the input points?
  
  compute();
  if (centre == null)
    return input.getFactory().createPolygon(null, null);
  Point centrePoint = input.getFactory().createPoint(centre);
  if (radius == 0.0)
    return centrePoint;
  return centrePoint.buffer(radius);
}

代码示例来源：origin: org.geotools/gt-render

public Geometry buffer(double distance) {
  return point.buffer(distance);
}

代码示例来源：origin: org.geotools/gt-render

public Geometry buffer(double distance, int quadrantSegments, int endCapStyle) {
  return point.buffer(distance, quadrantSegments, endCapStyle);
}

代码示例来源：origin: org.geotools/gt-render

public Geometry buffer(double distance, int quadrantSegments) {
  return point.buffer(distance, quadrantSegments);
}

代码示例来源：origin: org.geotools/gt-process-feature

@Override
public Polygon getBuffer(double distance) {
  // convert to the target unit
  distance = converter.convert(distance);
  // buffer and return
  return (Polygon) center.buffer(distance, quadrantSegments);
}

代码示例来源：origin: mapplus/spatial_statistics_for_geotools_udig

public Geometry getStandardDistanceAsCircle(List<SpatialEvent> spatialEventSet,
    double standardDeviation, boolean useWeight) {
  SpatialEvent sdtPoint = getStandardDistance(spatialEventSet, standardDeviation, useWeight);
  Point centerPoint = gf.createPoint(sdtPoint.getCoordinate());
  // for degree in NUM.arange(0, 360):
  return centerPoint.buffer(sdtPoint.xVal * standardDeviation, 90, 1);
}

代码示例来源：origin: mapplus/spatial_statistics_for_geotools_udig

private Geometry bufferWedge(Point centroid, double azimuth, double wedgeAngle,
    double innerRadius, double outerRadius) {
  double minRadius = Math.min(outerRadius, innerRadius);
  double maxRadius = Math.max(outerRadius, innerRadius);
  if (wedgeAngle >= 360) {
    Geometry buffered = centroid.buffer(maxRadius, SEG);
    if (minRadius > 0) {
      buffered = buffered.difference(centroid.buffer(minRadius, SEG));
    }
    return buffered;
  }
  // make azimuth 0 north and positive clockwise (compass direction)
  azimuth = -1.0 * azimuth + 90;
  double fromAzimuth = azimuth - wedgeAngle * 0.5;
  double toAzimuth = azimuth + wedgeAngle * 0.5;
  return createWedgeBuffer(centroid.getCoordinate(), fromAzimuth, toAzimuth, minRadius,
      maxRadius);
}

代码示例来源：origin: com.conveyal/gtfs-lib

public Geometry getMergedBuffers() {
    if (this.mergedBuffers == null) {
//            synchronized (this) {
        Collection<Geometry> polygons = new ArrayList<>();
        for (Stop stop : this.stops.values()) {
          if (getStopTimesForStop(stop.stop_id).isEmpty()) {
            continue;
          }
          if (stop.stop_lat > -1 && stop.stop_lat < 1 || stop.stop_lon > -1 && stop.stop_lon < 1) {
            continue;
          }
          Point stopPoint = gf.createPoint(new Coordinate(stop.stop_lon, stop.stop_lat));
          Polygon stopBuffer = (Polygon) stopPoint.buffer(.01);
          polygons.add(stopBuffer);
        }
        Geometry multiGeometry = gf.buildGeometry(polygons);
        this.mergedBuffers = multiGeometry.union();
        if (polygons.size() > 100) {
          this.mergedBuffers = DouglasPeuckerSimplifier.simplify(this.mergedBuffers, .001);
        }
//            }
    }
    return this.mergedBuffers;
  }

代码示例来源：origin: com.vividsolutions/jts-core

/**
 * Gets a geometry which represents the Minimum Bounding Circle.
 * If the input is degenerate (empty or a single unique point),
 * this method will return an empty geometry or a single Point geometry.
 * Otherwise, a Polygon will be returned which approximates the 
 * Minimum Bounding Circle. 
 * (Note that because the computed polygon is only an approximation, 
 * it may not precisely contain all the input points.)
 * 
 * @return a Geometry representing the Minimum Bounding Circle.
 */
public Geometry getCircle()
{
  //TODO: ensure the output circle contains the extermal points.
  //TODO: or maybe even ensure that the returned geometry contains ALL the input points?
  
  compute();
  if (centre == null)
    return input.getFactory().createPolygon(null, null);
  Point centrePoint = input.getFactory().createPoint(centre);
  if (radius == 0.0)
    return centrePoint;
  return centrePoint.buffer(radius);
}

代码示例来源：origin: mapplus/spatial_statistics_for_geotools_udig

public CircularBinningVisitor(ReferencedEnvelope bbox, double radius) {
  this.diameter = radius * 2.0;
  columns = (int) Math.floor((bbox.getWidth() / diameter) + 0.5d);
  rows = (int) Math.floor((bbox.getHeight() / diameter) + 0.5d);
  this.columns = columns * diameter < bbox.getWidth() ? columns + 1 : columns;
  this.rows = rows * diameter < bbox.getHeight() ? rows + 1 : rows;
  // recalculate envelope : origin = lower left
  CoordinateReferenceSystem targetCRS = bbox.getCoordinateReferenceSystem();
  ReferencedEnvelope finalBBox = new ReferencedEnvelope(targetCRS);
  finalBBox.init(bbox.getMinX(), bbox.getMinX() + (columns * diameter), bbox.getMinY(),
      bbox.getMinY() + (rows * diameter));
  this.extent = finalBBox;
  this.minX = finalBBox.getMinX();
  this.minY = finalBBox.getMinY();
  this.gridValues = new Double[rows][columns];
  Point center = gf.createPoint(new Coordinate(minX + radius, minY + radius));
  this.binTemplate = center.buffer(radius, quadrantSegments);
}

代码示例来源：origin: matsim-org/matsim

private void processLink(Link link, EmissionsByPollutant emissions, Grid<Map<Pollutant, Double>> grid) {
  // create a clipping area to speed up calculation time
  // use 5*smoothing radius as longer distances result in a weighting of effectively 0
  Geometry clip = factory.createPoint(new Coordinate(link.getCoord().getX(), link.getCoord().getY())).buffer(smoothingRadius * 5);
  grid.getCells(clip).forEach(cell -> {
    double normalizationFactor = grid.getCellArea() / (Math.PI * smoothingRadius * smoothingRadius);
    double weight = SpatialInterpolation.calculateWeightFromLine(
        transformToCoordinate(link.getFromNode()), transformToCoordinate(link.getToNode()),
        cell.getCoordinate(), smoothingRadius);
    processCell(cell, emissions, weight * normalizationFactor);
  });
}

代码示例来源：origin: org.onebusaway/onebusaway-transit-data-federation

@Override
 public void handleEntity(Object bean) {
  Stop stop = (Stop) bean;
  if (_projection == null) {
   int zone = UTMLibrary.getUTMZoneForLongitude(stop.getLon());
   _projection = new UTMProjection(zone);
  }
  
  XYPoint point = _projection.forward(new CoordinatePoint(stop.getLat(),
    stop.getLon()));
  Point p = _factory.createPoint(new Coordinate(point.getX(), point.getY()));
  Geometry geometry = p.buffer(_bufferRadiusInMeters).getEnvelope();
  if (_geometry == null)
   _geometry = geometry;
  else
   _geometry = _geometry.union(geometry);
 }
}

代码示例来源：origin: org.onebusaway/onebusaway-transit-data-federation-builder

@Override
 public void handleEntity(Object bean) {
  Stop stop = (Stop) bean;
  if (_projection == null) {
   int zone = UTMLibrary.getUTMZoneForLongitude(stop.getLon());
   _projection = new UTMProjection(zone);
  }
  XYPoint point = _projection.forward(new CoordinatePoint(stop.getLat(),
    stop.getLon()));
  Point p = _factory.createPoint(new Coordinate(point.getX(), point.getY()));
  Geometry geometry = p.buffer(_bufferRadiusInMeters).getEnvelope();
  if (_geometry == null)
   _geometry = geometry;
  else
   _geometry = _geometry.union(geometry);
 }
}

代码示例来源：origin: OneBusAway/onebusaway-application-modules

@Override
 public void handleEntity(Object bean) {
  Stop stop = (Stop) bean;
  if (_projection == null) {
   int zone = UTMLibrary.getUTMZoneForLongitude(stop.getLon());
   _projection = new UTMProjection(zone);
  }
  XYPoint point = _projection.forward(new CoordinatePoint(stop.getLat(),
    stop.getLon()));
  Point p = _factory.createPoint(new Coordinate(point.getX(), point.getY()));
  Geometry geometry = p.buffer(_bufferRadiusInMeters).getEnvelope();
  if (_geometry == null)
   _geometry = geometry;
  else
   _geometry = _geometry.union(geometry);
 }
}

代码示例来源：origin: mapplus/spatial_statistics_for_geotools_udig

@Override
  public SimpleFeature next() throws NoSuchElementException {
    SimpleFeature feature = delegate.next();
    for (Object attribute : feature.getAttributes()) {
      if (attribute instanceof Geometry) {
        Geometry geometry = (Geometry) attribute;
        builder.add(geometry.getCentroid().buffer(radius, quadrantSegments));
      } else {
        builder.add(attribute);
      }
    }
    return builder.buildFeature(feature.getID());
  }
}

代码示例来源：origin: mapplus/spatial_statistics_for_geotools_udig

private void init(SimpleFeatureBuilder builder) {
  ListFeatureCollection result = new ListFeatureCollection(builder.getFeatureType());
  String typeName = builder.getFeatureType().getTypeName();
  int featureID = 1;
  
  // create circle
  double radius_step = radius / 5;
  for (int index = 0; index < 5; index++) {
    double buffer_radius = radius_step * (index + 1);
    SimpleFeature feature = builder.buildFeature(buildID(typeName, featureID++));
    feature.setDefaultGeometry(center.buffer(buffer_radius, SEG).getBoundary());
    feature.setAttribute(FIELDS[0], buffer_radius);
    result.add(feature);
  }
  // create direction
  for (int index = 0; index < 16; index++) {
    double degree = 22.5 * index;
    SimpleFeature feature = builder.buildFeature(buildID(typeName, featureID++));
    feature.setDefaultGeometry(createLine(center, Math.toRadians(degree), radius));
    feature.setAttribute(FIELDS[1], NORTH[index]);
    result.add(feature);
  }
  this.iter = result.features();
}

代码示例来源：origin: org.geoserver.extension/wps-core

public void testExecutePoint() throws Exception {
  SimpleFeatureTypeBuilder tb = new SimpleFeatureTypeBuilder();
  tb.setName("featureType");
  tb.add("geometry", Geometry.class);
  tb.add("integer", Integer.class);
  GeometryFactory gf = new GeometryFactory();
  SimpleFeatureBuilder b = new SimpleFeatureBuilder(tb.buildFeatureType());
  DefaultFeatureCollection features = new DefaultFeatureCollection(null, b.getFeatureType());
  for (int i = 0; i < 2; i++) {
    b.add(gf.createPoint(new Coordinate(i, i)));
    b.add(i);
    features.add(b.buildFeature(i + ""));
  }
  Double distance = new Double(500);
  BufferFeatureCollection process = new BufferFeatureCollection();
  SimpleFeatureCollection output = process.execute(features, distance, null);
  assertEquals(2, output.size());
  SimpleFeatureIterator iterator = output.features();
  for (int i = 0; i < 2; i++) {
    Geometry expected = gf.createPoint(new Coordinate(i, i)).buffer(distance);
    SimpleFeature sf = iterator.next();
    assertTrue(expected.equals((Geometry) sf.getDefaultGeometry()));
  }
}

代码示例来源：origin: mapplus/spatial_statistics_for_geotools_udig

while (currentX <= bbox.getMaxX()) {
  Point center = gf.createPoint(new Coordinate(currentX, currentY));
  Geometry geometry = center.buffer(radius, quadrantSegments);

代码示例来源：origin: mapplus/spatial_statistics_for_geotools_udig

case Circle:
  double radius = bounds.getWidth() / 2.0;
  cellGeom = gf.createPoint(bounds.centre()).buffer(radius);
  break;

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