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Point | API Reference | ArcGIS API for JavaScript 3.46

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

(Added at v1.0)

A location defined by an X- and Y- coordinate. It can be map units or screen units.

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that use this class.

esri/geometry/Geometry
|_esri/geometry/Point

Constructor Details

Creates a new Point object using x, y, and a spatial reference. At version 3.3 if a spatial reference is not provided a default spatial reference of 4326 will be assigned.

require([
  "esri/geometry/Point", "esri/SpatialReference", ... 
], function(Point, SpatialReference, ... ) {
  new Point(-118.15, 33.80, new SpatialReference({ wkid: 4326 }));
  ...
});

Creates a new Point object using an array containing an x,y coordinate value and a spatial reference. At version 3.3 if a spatial reference is not provided a default spatial reference of 4326 will be assigned.

require([
  "esri/geometry/Point", "esri/SpatialReference", ... 
], function(Point, SpatialReference, ... ) {
  var point = new Point([-122.65,45.53],new SpatialReference({ wkid:4326 }));
  ...
});

Creates a new Point object using a JSON object.

require([
  "esri/geometry/Point", ... 
], function(Point, ... ) {
  var point = new Point( {"x": -122.65, "y": 45.53, "spatialReference": {"wkid": 4326 } });
  ...
});

Create a point object and initialize it with specified longitude and latitude. (Added at v3.3)

require([
  "esri/geometry/Point", ... 
], function(Point, ... ) {
  var point = new Point(-98, 38);
  ...
});

Create a point object and initialize it with an array containing longitude and latitude values.

require([
  "esri/geometry/Point", ... 
], function(Point, ... ) {
  var point = new Point([-98, 38]);
  ...
});

Create a point object and initialize it with an object that has latitude and longitude properties. (Added at v3.3)

require([
  "esri/geometry/Point", ... 
], function(Point, ... ) {
  var point = new Point({
    latitude: 38,
    longitude: -98
  });
  ...
});

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;
      }
    });

  });
});

The type of geometry.

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

X-coordinate of a point in map units.

Y-coordinate of a point in map units.

Method Details

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)

Returns the latitude coordinate for this point if the spatial reference of the point is Web Mercator or Geographic (4326). (Added at v3.3)

Returns the longitude coordinate for this point if the spatial reference of the point is Web Mercator or Geographic (4326). (Added at v3.3)

Shifts the x coordinate to within +/- 180 span. (Added at v3.8)

Returns a new Point with x and y offsets. Units are map units.

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

Sets the latitude coordinate for this point to the specified value if the point's spatial reference is Web Mercator or Geographic (4326). (Added at v3.3)

Sets the longitude coordinate for this point to the specified value if the point's spatial reference is Web Mercator or Geographic (4326). (Added at v3.3)

Sets the spatial reference.

Sets x-coordinate of point.

Sets y-coordinate of point.

Updates a point. (Added at v1.4)

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