Cut a geometry along a polyline.
Use case
You might cut a polygon representing a large parcel to subdivide it into smaller parcels.
How to use the sample
Click the "Cut" button to cut the polygon with the polyline and see the resulting parts (shaded in different colors). Click the "Reset" button to remove the separate parts.
How it works
- Pass the geometry and polyline to
GeometryEngine.cutto cut the geometry along the polyline. - Loop through the returned list of part geometries. Some of these geometries may be multi-part.
Relevant API
- GeometryEngine
- Polygon
- Polyline
Tags
cut, geometry, split
Sample Code
CutGeometrySample.java
/* * Copyright 2018 Esri. * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. */ package com.esri.samples.cut_geometry; import java.util.Arrays; import java.util.List; import javafx.application.Application; import javafx.geometry.Insets; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.StackPane; import javafx.scene.paint.Color; import javafx.stage.Stage; import com.esri.arcgisruntime.ArcGISRuntimeEnvironment; import com.esri.arcgisruntime.geometry.Geometry; import com.esri.arcgisruntime.geometry.GeometryEngine; import com.esri.arcgisruntime.geometry.Point; import com.esri.arcgisruntime.geometry.PointCollection; import com.esri.arcgisruntime.geometry.Polygon; import com.esri.arcgisruntime.geometry.Polyline; import com.esri.arcgisruntime.geometry.SpatialReferences; import com.esri.arcgisruntime.mapping.ArcGISMap; import com.esri.arcgisruntime.mapping.BasemapStyle; import com.esri.arcgisruntime.mapping.view.Graphic; import com.esri.arcgisruntime.mapping.view.GraphicsOverlay; import com.esri.arcgisruntime.mapping.view.MapView; import com.esri.arcgisruntime.symbology.SimpleFillSymbol; import com.esri.arcgisruntime.symbology.SimpleLineSymbol; public class CutGeometrySample extends Application { private MapView mapView; @Override public void start(Stage stage) { try { // create stack pane and application scene StackPane stackPane = new StackPane(); Scene scene = new Scene(stackPane); // set title, size, and add scene to stage stage.setTitle("Cut Geometry Sample"); stage.setWidth(800); stage.setHeight(700); stage.setScene(scene); stage.show(); // authentication with an API key or named user is required to access basemaps and other location services String yourAPIKey = System.getProperty("apiKey"); ArcGISRuntimeEnvironment.setApiKey(yourAPIKey); // create a map with the topographic basemap style ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC); // create a map view and set the map to it mapView = new MapView(); mapView.setMap(map); // create a graphics overlay GraphicsOverlay graphicsOverlay = new GraphicsOverlay(); mapView.getGraphicsOverlays().add(graphicsOverlay); // create a blue polygon graphic to cut Graphic polygonGraphic = new Graphic(createLakeSuperiorPolygon(), new SimpleFillSymbol(SimpleFillSymbol.Style .SOLID, Color.web("blue", 0.12), new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.BLUE, 2))); graphicsOverlay.getGraphics().add(polygonGraphic); // create a red polyline graphic to cut the polygon Graphic polylineGraphic = new Graphic(createBorder(), new SimpleLineSymbol(SimpleLineSymbol.Style.DOT, Color.RED, 3)); graphicsOverlay.getGraphics().add(polylineGraphic); // zoom to show the polygon graphic mapView.setViewpointGeometryAsync(polygonGraphic.getGeometry()); // create a graphics overlay to contain the cut areas GraphicsOverlay cutAreasOverlay = new GraphicsOverlay(); mapView.getGraphicsOverlays().add(cutAreasOverlay); // create a button to perform the cut and reset operation var button = new Button("Cut"); button.setOnAction(e -> { if (cutAreasOverlay.getGraphics().isEmpty()){ // cut the polygon geometry with the polyline, expect two geometries List<Geometry> parts = GeometryEngine.cut(polygonGraphic.getGeometry(), (Polyline) polylineGraphic.getGeometry()); // create graphics for the US and Canada sides Graphic canadaSide = new Graphic(parts.get(0), new SimpleFillSymbol(SimpleFillSymbol.Style.FORWARD_DIAGONAL, Color.AQUAMARINE, new SimpleLineSymbol(SimpleLineSymbol.Style.NULL, Color.WHITE, 0))); Graphic usSide = new Graphic(parts.get(1), new SimpleFillSymbol(SimpleFillSymbol.Style.FORWARD_DIAGONAL, Color.YELLOW, new SimpleLineSymbol(SimpleLineSymbol.Style.NULL, Color.WHITE, 0))); cutAreasOverlay.getGraphics().addAll(Arrays.asList(canadaSide, usSide)); // update the button text button.setText("Reset"); } else { // remove cut graphics cutAreasOverlay.getGraphics().clear(); // update the button text button.setText("Cut"); } }); // add the map view to the stack pane stackPane.getChildren().addAll(mapView, button); StackPane.setAlignment(button, Pos.TOP_LEFT); StackPane.setMargin(button, new Insets(10, 0, 0, 10)); } catch (Exception e) { // on any error, display the stack trace. e.printStackTrace(); } } /** * Creates a polyline along the US/Canada border over Lake Superior. * * @return polyline */ private Polyline createBorder() { PointCollection points = new PointCollection(SpatialReferences.getWebMercator()); points.add(new Point(-9981328.687124, 6111053.281447)); points.add(new Point(-9946518.044066, 6102350.620682)); points.add(new Point(-9872545.427566, 6152390.920079)); points.add(new Point(-9838822.617103, 6157830.083057)); points.add(new Point(-9446115.050097, 5927209.572793)); points.add(new Point(-9430885.393759, 5876081.440801)); points.add(new Point(-9415655.737420, 5860851.784463)); return new Polyline(points); } /** * Creates a polygon of points around Lake Superior. * * @return polygon */ private Polygon createLakeSuperiorPolygon() { PointCollection points = new PointCollection(SpatialReferences.getWebMercator()); points.add(new Point(-10254374.668616, 5908345.076380)); points.add(new Point(-10178382.525314, 5971402.386779)); points.add(new Point(-10118558.923141, 6034459.697178)); points.add(new Point(-9993252.729399, 6093474.872295)); points.add(new Point(-9882498.222673, 6209888.368416)); points.add(new Point(-9821057.766387, 6274562.532928)); points.add(new Point(-9690092.583250, 6241417.023616)); points.add(new Point(-9605207.742329, 6206654.660191)); points.add(new Point(-9564786.389509, 6108834.986367)); points.add(new Point(-9449989.747500, 6095091.726408)); points.add(new Point(-9462116.153346, 6044160.821855)); points.add(new Point(-9417652.665244, 5985145.646738)); points.add(new Point(-9438671.768711, 5946341.148031)); points.add(new Point(-9398250.415891, 5922088.336339)); points.add(new Point(-9419269.519357, 5855797.317714)); points.add(new Point(-9467775.142741, 5858222.598884)); points.add(new Point(-9462924.580403, 5902686.086985)); points.add(new Point(-9598740.325877, 5884092.264688)); points.add(new Point(-9643203.813979, 5845287.765981)); points.add(new Point(-9739406.633691, 5879241.702350)); points.add(new Point(-9783061.694736, 5922896.763395)); points.add(new Point(-9844502.151022, 5936640.023354)); points.add(new Point(-9773360.570059, 6019099.583107)); points.add(new Point(-9883306.649729, 5968977.105610)); points.add(new Point(-9957681.938918, 5912387.211662)); points.add(new Point(-10055501.612742, 5871965.858842)); points.add(new Point(-10116942.069028, 5884092.264688)); points.add(new Point(-10111283.079633, 5933406.315128)); points.add(new Point(-10214761.742852, 5888134.399970)); points.add(new Point(-10254374.668616, 5901877.659929)); return new Polygon(points); } /** * Stops and releases all resources used in application. */ @Override public void stop() { if (mapView != null) { mapView.dispose(); } } /** * Opens and runs application. * * @param args arguments passed to this application */ public static void main(String[] args) { Application.launch(args); } }