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Multipoint | API Reference | ArcGIS API for JavaScript 3.46

require(["esri/geometry/Multipoint"], function(Multipoint) { /* code goes here */ });

(Added at v1.0)

An ordered collection of points.

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that use this class.

esri/geometry/Geometry
|_esri/geometry/Multipoint

Constructor Details

Creates a new Multipoint object.

require([
  "esri/geometry/Multipoint", "esri/SpatialReference", ... 
], function(Multipoint, SpatialReference, ... ) {
  var multiPoint = new Multipoint(new SpatialReference({ wkid:4326 }));
  ...
});

Creates a new Multipoint object using a JSON object.

require([
  "esri/geometry/Multipoint", ... 
], function(Multipoint, ... ) {
  var mpJson ={"points":[[-122.63,45.51],[-122.56,45.51],[-122.56,45.55]],"spatialReference":({" wkid":4326 })};
  var multipoint = new Multipoint(mpJson);
  ...
});

Property Details

The cache is used to store values computed from geometries that need to cleared or recomputed upon mutation. An example is the extent of a polygon. The default value is undefined. (Added at v3.13)

Default value: undefined

var map;

require([
  "esri/InfoTemplate",
  "esri/layers/FeatureLayer",
  "esri/map",
  "esri/tasks/query", "dojo/domReady!"
], function (InfoTemplate, FeatureLayer, Map, Query){

  map = new Map("map", {
    basemap: "topo-vector",
    center: [-122.45, 37.75], // longitude, latitude
    zoom: 9
  });

  var infoTemplate = new InfoTemplate("Attributes", "${*}");

  var countiesFeatureLayer = new FeatureLayer("http://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/3",
    {
      mode: FeatureLayer.MODE_ONDEMAND,
      infoTemplate: infoTemplate,
      outFields: ['*']
    });
  var highwaysFeatureLayer = new FeatureLayer("http://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/1",
    {
      mode: FeatureLayer.MODE_ONDEMAND,
      infoTemplate: infoTemplate,
      outFields: ['*']
    });

  map.on("load", function (){
    map.addLayer(countiesFeatureLayer);
    map.addLayer(highwaysFeatureLayer);

    var query = new Query();
    query.geometry = map.extent;
    query.spatialRelationship = Query.SPATIAL_REL_ENVELOPEINTERSECTS;
    query.returnGeometry = true;
    query.outFields = ["*"];

    countiesFeatureLayer.queryFeatures(query, function (featureSet){
      var polygon = featureSet.features[0].geometry;
      // populate the Geometry cache by calling getExtent()
      var polygonExtent = polygon.getExtent();
      console.log("polygonExtent", polygonExtent);
      console.log("polygon.cache._extent", polygon.cache._extent);

      for (var i = 0; i < featureSet.features.length; i  ) {
        var feature = featureSet.features[i];
        console.log("Polygon geometry cache, %o", feature.geometry.cache);
        feature.geometry.clearCache();
        console.log("Polygon geometry clear cache, %o", feature.geometry.cache);
        // Break out of the loop after the first result
        break;
      }
    });

    highwaysFeatureLayer.queryFeatures(query, function (featureSet){
      var line = featureSet.features[0].geometry;
      // populate the Geometry cache by calling getExtent()
      var lineExtent = line.getExtent();
      console.log("lineExtent", lineExtent);
      console.log("line.cache._extent", line.cache._extent);

      for (var i = 0; i < featureSet.features.length; i  ) {
        var feature = featureSet.features[i];
        console.log("Line geometry cache, %o", feature.geometry.cache);
        feature.geometry.clearCache();
        console.log("Line geometry clear cache, %o", feature.geometry.cache);
        // Break out of the loop after the first result
        break;
      }
    });

  });
});

An array of one or more points.

require([
  "esri/geometry/Multipoint", "esri/SpatialReference", ... 
], function(Multipoint, SpatialReference, ... ) {
  var mp = new Multipoint(new SpatialReference({wkid:4326}));
  mp.points = [[-122.63,45.51],[-122.56,45.51],[-122.56,45.55],[-122.62,45.],[-122.59,45.53]];
  ...
});

The type of geometry.

Known values: point | multipoint | polyline | polygon | extent

Method Details

Adds a point to the Multipoint. The point can be one of the following: an Esri Point, a number array, or a JSON object.

Point example:

require([
  "esri/geometry/Multipoint", "esri/SpatialReference", "esri/geometry/Point", ... 
], function(Multipoint, SpatialReference, Point, ... ) {
  var multipoint = new Multipoint(new SpatialReference{ ... });
  multipoint.addPoint(new Point(-122.63,45.51));
  ...
});

JSON example:

require([
  "esri/geometry/Multipoint", ... 
], function(Multipoint, ... ) {
  multipoint.addPoint({"x": -122.65, "y": 45.53 });
  ...
});

Sets the cache property to undefined. (Added at v3.13)

Returns the value for a named property stored in the cache. (Added at v3.13)

Gets the extent of all the points. If only one point is present, the extent has a width and height of 0.

Returns the point at the specified index. (Added at v2.0)

Removes a point from the Multipoint. The index specifies which point to remove.

Sets the value for a named property stored in the cache. (Added at v3.13)

Updates the point at the specified index. (Added at v2.0)

Sets the spatial reference.

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