Modify Features Test

This example uses OpenLayers v4.0.1. The latest is v.

#### Modify Features Test

Example for testing feature modification.

Example for testing feature modification.

Related API documentation:

- ol.Map
,
- ol.View
,
- ol.format.GeoJSON
,
- ol.interaction
,
- ol.interaction.Modify
,
- ol.interaction.Select
,
- ol.layer.Vector
,
- ol.source.Vector
,
- ol.style.Circle
,
- ol.style.Fill
,
- ol.style.Stroke
,
- ol.style.Style

Copy Edit
Modify Features Test Example for testing feature modification. var styleFunction = (function() { var styles = {}; var image = new ol.style.Circle({ radius: 5, fill: null, stroke: new ol.style.Stroke({color: 'orange', width: 2}) }); styles['Point'] = new ol.style.Style({image: image}); styles['Polygon'] = new ol.style.Style({ stroke: new ol.style.Stroke({ color: 'blue', width: 3 }), fill: new ol.style.Fill({ color: 'rgba(0, 0, 255, 0.1)' }) }); styles['MultiLineString'] = new ol.style.Style({ stroke: new ol.style.Stroke({ color: 'green', width: 3 }) }); styles['MultiPolygon'] = new ol.style.Style({ stroke: new ol.style.Stroke({ color: 'yellow', width: 1 }), fill: new ol.style.Fill({ color: 'rgba(255, 255, 0, 0.1)' }) }); styles['default'] = new ol.style.Style({ stroke: new ol.style.Stroke({ color: 'red', width: 3 }), fill: new ol.style.Fill({ color: 'rgba(255, 0, 0, 0.1)' }), image: image }); return function(feature) { return styles[feature.getGeometry().getType()] || styles['default']; }; })(); var geojsonObject = { 'type': 'FeatureCollection', 'crs': { 'type': 'name', 'properties': { 'name': 'EPSG:3857' } }, 'features': [{ 'type': 'Feature', 'geometry': { 'type': 'Point', 'coordinates': [0, 0] } }, { 'type': 'Feature', 'geometry': { 'type': 'MultiPoint', 'coordinates': [[-2e6, 0], [0, -2e6]] } }, { 'type': 'Feature', 'geometry': { 'type': 'LineString', 'coordinates': [[4e6, -2e6], [8e6, 2e6], [9e6, 2e6]] } }, { 'type': 'Feature', 'geometry': { 'type': 'LineString', 'coordinates': [[4e6, -2e6], [8e6, 2e6], [8e6, 3e6]] } }, { 'type': 'Feature', 'geometry': { 'type': 'Polygon', 'coordinates': [[[-5e6, -1e6], [-4e6, 1e6], [-3e6, -1e6], [-5e6, -1e6]], [[-4.5e6, -0.5e6], [-3.5e6, -0.5e6], [-4e6, 0.5e6], [-4.5e6, -0.5e6]]] } }, { 'type': 'Feature', 'geometry': { 'type': 'MultiLineString', 'coordinates': [ [[-1e6, -7.5e5], [-1e6, 7.5e5]], [[-1e6, -7.5e5], [-1e6, 7.5e5], [-5e5, 0], [-1e6, -7.5e5]], [[1e6, -7.5e5], [15e5, 0], [15e5, 0], [1e6, 7.5e5]], [[-7.5e5, -1e6], [7.5e5, -1e6]], [[-7.5e5, 1e6], [7.5e5, 1e6]] ] } }, { 'type': 'Feature', 'geometry': { 'type': 'MultiPolygon', 'coordinates': [ [[[-5e6, 6e6], [-5e6, 8e6], [-3e6, 8e6], [-3e6, 6e6], [-5e6, 6e6]]], [[[-3e6, 6e6], [-2e6, 8e6], [0, 8e6], [0, 6e6], [-3e6, 6e6]]], [[[1e6, 6e6], [1e6, 8e6], [3e6, 8e6], [3e6, 6e6], [1e6, 6e6]]] ] } }, { 'type': 'Feature', 'geometry': { 'type': 'GeometryCollection', 'geometries': [{ 'type': 'LineString', 'coordinates': [[-5e6, -5e6], [0, -5e6]] }, { 'type': 'Point', 'coordinates': [4e6, -5e6] }, { 'type': 'Polygon', 'coordinates': [ [[1e6, -6e6], [2e6, -4e6], [3e6, -6e6], [1e6, -6e6]] ] }] } }] }; var source = new ol.source.Vector({ features: (new ol.format.GeoJSON()).readFeatures(geojsonObject) }); var layer = new ol.layer.Vector({ source: source, style: styleFunction }); var overlayStyle = (function() { var styles = {}; styles['Polygon'] = [ new ol.style.Style({ fill: new ol.style.Fill({ color: [255, 255, 255, 0.5] }) }), new ol.style.Style({ stroke: new ol.style.Stroke({ color: [255, 255, 255, 1], width: 5 }) }), new ol.style.Style({ stroke: new ol.style.Stroke({ color: [0, 153, 255, 1], width: 3 }) }) ]; styles['MultiPolygon'] = styles['Polygon']; styles['LineString'] = [ new ol.style.Style({ stroke: new ol.style.Stroke({ color: [255, 255, 255, 1], width: 5 }) }), new ol.style.Style({ stroke: new ol.style.Stroke({ color: [0, 153, 255, 1], width: 3 }) }) ]; styles['MultiLineString'] = styles['LineString']; styles['Point'] = [ new ol.style.Style({ image: new ol.style.Circle({ radius: 7, fill: new ol.style.Fill({ color: [0, 153, 255, 1] }), stroke: new ol.style.Stroke({ color: [255, 255, 255, 0.75], width: 1.5 }) }), zIndex: 100000 }) ]; styles['MultiPoint'] = styles['Point']; styles['GeometryCollection'] = styles['Polygon'].concat(styles['Point']); return function(feature) { return styles[feature.getGeometry().getType()]; }; })(); var select = new ol.interaction.Select({ style: overlayStyle }); var modify = new ol.interaction.Modify({ features: select.getFeatures(), style: overlayStyle }); var map = new ol.Map({ interactions: ol.interaction.defaults().extend([select, modify]), layers: [layer], target: 'map', view: new ol.View({ center: [0, 1000000], zoom: 2 }) }); .map { background: grey; } <div id="map" class="map"></div>

    <!DOCTYPE html>
    <html>
      <head>
        <title>Modify Features Test</title>
        <link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css">
        <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
        <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
        <script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script>
        <style>
          .map {
            background: grey;
          }
        </style>
      </head>
      <body>
        <div id="map" class="map"></div>
        <script>
          var styleFunction = (function() {
            var styles = {};
            var image = new ol.style.Circle({
              radius: 5,
              fill: null,
              stroke: new ol.style.Stroke({color: 'orange', width: 2})
            });
            styles['Point'] = new ol.style.Style({image: image});
            styles['Polygon'] = new ol.style.Style({
              stroke: new ol.style.Stroke({
                color: 'blue',
                width: 3
              }),
              fill: new ol.style.Fill({
                color: 'rgba(0, 0, 255, 0.1)'
              })
            });
            styles['MultiLineString'] = new ol.style.Style({
              stroke: new ol.style.Stroke({
                color: 'green',
                width: 3
              })
            });
            styles['MultiPolygon'] = new ol.style.Style({
              stroke: new ol.style.Stroke({
                color: 'yellow',
                width: 1
              }),
              fill: new ol.style.Fill({
                color: 'rgba(255, 255, 0, 0.1)'
              })
            });
            styles['default'] = new ol.style.Style({
              stroke: new ol.style.Stroke({
                color: 'red',
                width: 3
              }),
              fill: new ol.style.Fill({
                color: 'rgba(255, 0, 0, 0.1)'
              }),
              image: image
            });
            return function(feature) {
              return styles[feature.getGeometry().getType()] || styles['default'];
            };
          })();

          var geojsonObject = {
            'type': 'FeatureCollection',
            'crs': {
              'type': 'name',
              'properties': {
                'name': 'EPSG:3857'
              }
            },
            'features': [{
              'type': 'Feature',
              'geometry': {
                'type': 'Point',
                'coordinates': [0, 0]
              }
            }, {
              'type': 'Feature',
              'geometry': {
                'type': 'MultiPoint',
                'coordinates': [[-2e6, 0], [0, -2e6]]
              }
            }, {
              'type': 'Feature',
              'geometry': {
                'type': 'LineString',
                'coordinates': [[4e6, -2e6], [8e6, 2e6], [9e6, 2e6]]
              }
            }, {
              'type': 'Feature',
              'geometry': {
                'type': 'LineString',
                'coordinates': [[4e6, -2e6], [8e6, 2e6], [8e6, 3e6]]
              }
            }, {
              'type': 'Feature',
              'geometry': {
                'type': 'Polygon',
                'coordinates': [[[-5e6, -1e6], [-4e6, 1e6],
                    [-3e6, -1e6], [-5e6, -1e6]], [[-4.5e6, -0.5e6],
                    [-3.5e6, -0.5e6], [-4e6, 0.5e6], [-4.5e6, -0.5e6]]]
              }
            }, {
              'type': 'Feature',
              'geometry': {
                'type': 'MultiLineString',
                'coordinates': [
                  [[-1e6, -7.5e5], [-1e6, 7.5e5]],
                  [[-1e6, -7.5e5], [-1e6, 7.5e5], [-5e5, 0], [-1e6, -7.5e5]],
                  [[1e6, -7.5e5], [15e5, 0], [15e5, 0], [1e6, 7.5e5]],
                  [[-7.5e5, -1e6], [7.5e5, -1e6]],
                  [[-7.5e5, 1e6], [7.5e5, 1e6]]
                ]
              }
            }, {
              'type': 'Feature',
              'geometry': {
                'type': 'MultiPolygon',
                'coordinates': [
                  [[[-5e6, 6e6], [-5e6, 8e6], [-3e6, 8e6],
                      [-3e6, 6e6], [-5e6, 6e6]]],
                  [[[-3e6, 6e6], [-2e6, 8e6], [0, 8e6],
                      [0, 6e6], [-3e6, 6e6]]],
                  [[[1e6, 6e6], [1e6, 8e6], [3e6, 8e6],
                      [3e6, 6e6], [1e6, 6e6]]]
                ]
              }
            }, {
              'type': 'Feature',
              'geometry': {
                'type': 'GeometryCollection',
                'geometries': [{
                  'type': 'LineString',
                  'coordinates': [[-5e6, -5e6], [0, -5e6]]
                }, {
                  'type': 'Point',
                  'coordinates': [4e6, -5e6]
                }, {
                  'type': 'Polygon',
                  'coordinates': [
                    [[1e6, -6e6], [2e6, -4e6], [3e6, -6e6], [1e6, -6e6]]
                  ]
                }]
              }
            }]
          };

          var source = new ol.source.Vector({
            features: (new ol.format.GeoJSON()).readFeatures(geojsonObject)
          });

          var layer = new ol.layer.Vector({
            source: source,
            style: styleFunction
          });

          var overlayStyle = (function() {
            var styles = {};
            styles['Polygon'] = [
              new ol.style.Style({
                fill: new ol.style.Fill({
                  color: [255, 255, 255, 0.5]
                })
              }),
              new ol.style.Style({
                stroke: new ol.style.Stroke({
                  color: [255, 255, 255, 1],
                  width: 5
                })
              }),
              new ol.style.Style({
                stroke: new ol.style.Stroke({
                  color: [0, 153, 255, 1],
                  width: 3
                })
              })
            ];
            styles['MultiPolygon'] = styles['Polygon'];

            styles['LineString'] = [
              new ol.style.Style({
                stroke: new ol.style.Stroke({
                  color: [255, 255, 255, 1],
                  width: 5
                })
              }),
              new ol.style.Style({
                stroke: new ol.style.Stroke({
                  color: [0, 153, 255, 1],
                  width: 3
                })
              })
            ];
            styles['MultiLineString'] = styles['LineString'];

            styles['Point'] = [
              new ol.style.Style({
                image: new ol.style.Circle({
                  radius: 7,
                  fill: new ol.style.Fill({
                    color: [0, 153, 255, 1]
                  }),
                  stroke: new ol.style.Stroke({
                    color: [255, 255, 255, 0.75],
                    width: 1.5
                  })
                }),
                zIndex: 100000
              })
            ];
            styles['MultiPoint'] = styles['Point'];

            styles['GeometryCollection'] = styles['Polygon'].concat(styles['Point']);

            return function(feature) {
              return styles[feature.getGeometry().getType()];
            };
          })();

          var select = new ol.interaction.Select({
            style: overlayStyle
          });

          var modify = new ol.interaction.Modify({
            features: select.getFeatures(),
            style: overlayStyle
          });

          var map = new ol.Map({
            interactions: ol.interaction.defaults().extend([select, modify]),
            layers: [layer],
            target: 'map',
            view: new ol.View({
              center: [0, 1000000],
              zoom: 2
            })
          });
        </script>
      </body>
    </html>