title: Getting a central point from an esri multipoint with javascript
body: <p>I have created a webpage displaying markers on an ersi map using javasvipt.</p>
  
  <pre><code>Data: 
  MapNorth    MapEast
  439624  504743
  439622  504736
  439722  504775
  439738  504739
  439715  504774
  439734  504739
  </code></pre>
  
  <p>The javascript code:</p>
  
  <pre><code>var points = data.map(function(x){
                      return [x.MapEast, x.MapNorth];
                  });
  
                  var myMultiPoint = {"geometry":{"points":points,"spatialReference":27700},"symbol":{"color":[255,255,255,64],
                  "size":6,"angle":0,"xoffset":0,"yoffset":0,"type":"esriSMS","style":"esriSMSCircle",
                  "outline":{"color":[0,0,0,255],"width":6,"type":"esriSLS","style":"esriSLSSolid"}}};  
  
                  var gra = new esri.Graphic(myMultiPoint);
  
                  myMap.graphics.add(gra);
  
                  var graExtent = esri.graphicsExtent(myMap.graphics.graphics); 
                  myMap.setExtent(graExtent); 
  </code></pre>
  
  <p>What the above code does is plot markers on the map and then zooms into the extent. What my employers want now is for me to find the central point of all of those points and display one marker in the center.</p>
  
  <p>Can this be done? If so and you tell me how?</p>
  
  <p>Thanks 
  Paul </p>