openlayers/examples/geojson.js

goog.require('ol.Feature');
goog.require('ol.Map');
goog.require('ol.RendererHint');
goog.require('ol.View2D');
goog.require('ol.geom.Circle');
goog.require('ol.layer.Tile');
goog.require('ol.layer.Vector');
goog.require('ol.source.GeoJSON');
goog.require('ol.source.OSM');
goog.require('ol.style.Circle');
goog.require('ol.style.Fill');
goog.require('ol.style.Stroke');
goog.require('ol.style.Style');


var image = new ol.style.Circle({
  radius: 5,
  fill: null,
  stroke: new ol.style.Stroke({color: 'red', width: 1})
});

var styles = {
  'Point': [new ol.style.Style({
    image: image
  })],
  'LineString': [new ol.style.Style({
    stroke: new ol.style.Stroke({
      color: 'green',
      width: 1
    })
  })],
  'MultiLineString': [new ol.style.Style({
    stroke: new ol.style.Stroke({
      color: 'green',
      width: 1
    })
  })],
  'MultiPoint': [new ol.style.Style({
    image: image
  })],
  '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)'
    })
  })],
  'Polygon': [new ol.style.Style({
    stroke: new ol.style.Stroke({
      color: 'blue',
      lineDash: [4],
      width: 3
    }),
    fill: new ol.style.Fill({
      color: 'rgba(0, 0, 255, 0.1)'
    })
  })],
  'GeometryCollection': [new ol.style.Style({
    stroke: new ol.style.Stroke({
      color: 'magenta',
      width: 2
    }),
    fill: new ol.style.Fill({
      color: 'magenta'
    }),
    image: new ol.style.Circle({
      radius: 10,
      fill: null,
      stroke: new ol.style.Stroke({
        color: 'magenta'
      })
    })
  })],
  'Circle': [new ol.style.Style({
    stroke: new ol.style.Stroke({
      color: 'red',
      width: 2
    }),
    fill: new ol.style.Fill({
      color: 'rgba(255,0,0,0.2)'
    })
  })]
};

var styleFunction = function(feature, resolution) {
  return styles[feature.getGeometry().getType()];
};

var vectorSource = new ol.source.GeoJSON(
    /** @type {olx.source.GeoJSONOptions} */ ({
      object: {
        'type': 'FeatureCollection',
        'crs': {
          'type': 'name',
          'properties': {
            'name': 'EPSG:3857'
          }
        },
        'features': [
          {
            'type': 'Feature',
            'geometry': {
              'type': 'Point',
              'coordinates': [0, 0]
            }
          },
          {
            'type': 'Feature',
            'geometry': {
              'type': 'LineString',
              'coordinates': [[4e6, -2e6], [8e6, 2e6]]
            }
          },
          {
            'type': 'Feature',
            'geometry': {
              'type': 'LineString',
              'coordinates': [[4e6, 2e6], [8e6, -2e6]]
            }
          },
          {
            'type': 'Feature',
            'geometry': {
              'type': 'Polygon',
              'coordinates': [[[-5e6, -1e6], [-4e6, 1e6], [-3e6, -1e6]]]
            }
          },
          {
            'type': 'Feature',
            'geometry': {
              'type': 'MultiLineString',
              'coordinates': [
                [[-1e6, -7.5e5], [-1e6, 7.5e5]],
                [[1e6, -7.5e5], [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]]],
                [[[-2e6, 6e6], [-2e6, 8e6], [0e6, 8e6], [0e6, 6e6]]],
                [[[1e6, 6e6], [1e6, 8e6], [3e6, 8e6], [3e6, 6e6]]]
              ]
            }
          },
          {
            'type': 'Feature',
            'geometry': {
              'type': 'GeometryCollection',
              'geometries': [
                {
                  'type': 'LineString',
                  'coordinates': [[-5e6, -5e6], [0e6, -5e6]]
                },
                {
                  'type': 'Point',
                  'coordinates': [4e6, -5e6]
                },
                {
                  'type': 'Polygon',
                  'coordinates': [[[1e6, -6e6], [2e6, -4e6], [3e6, -6e6]]]
                }
              ]
            }
          }
        ]
      }
    }));

vectorSource.addFeature(new ol.Feature(new ol.geom.Circle([5e6, 7e6], 1e6)));

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

var map = new ol.Map({
  layers: [
    new ol.layer.Tile({
      source: new ol.source.OSM()
    }),
    vectorLayer
  ],
  renderer: ol.RendererHint.CANVAS,
  target: 'map',
  view: new ol.View2D({
    center: [0, 0],
    zoom: 2
  })
});