topic Cannot zoom to graphic in ArcGIS JavaScript Maps SDK Questions

Cannot zoom to graphic

williamcarr — Tue, 11 Mar 2014 18:35:47 GMT

I've been tackling this problem all day and help would surely be appreciated. I'm new to JS and I'm attempting to zoom to a graphic selected from a FindTask. The graphic shows up on the correct point but I can't for the life of me get it to zoom to a point feature. Thanks

This is slapped together from various samples and examples. JS 3.8.

 //create find parameters

        findParams = new esri.tasks.FindParameters();
        findParams.returnGeometry = true;
        findParams.layerIds = [0];
        findParams.searchFields = ["OBJECTID"];
        var sr = new esri.SpatialReference({wkid:102100});
        findParams.outSpatialReference = sr;
      }

      //set the search text to find parameters
      function execute(searchText) {
        findParams.searchText = searchText;
        findTask.execute(findParams, showResults);
      }

      //symbology for graphics
      function showResults(results) {
        var markerSymbol = new esri.symbol.SimpleMarkerSymbol(esri.symbol.SimpleMarkerSymbol.STYLE_SQUARE, 10);
        
      //find results return an array of findResult.
        map.graphics.clear();
        var dataForGrid = [];

        //Build an array of attribute information and add each found graphic to the map
        dojo.forEach(results, function(result) {
          var graphic = result.feature;

          if (graphic.geometry.x === 0 || graphic.geometry.y === 0) {
            console.warn(graphic.geometry.toJson());
            return;
          }

          switch (graphic.geometry.type) {
            case "point":
              graphic.setSymbol(markerSymbol);
              break;       
          }
      
          //add graphics to map
          map.graphics.add(graphic);
       
       
         map.setExtent(map.graphic[0].feature.geometry.getExtent());
    
        //THIS IS WHERE EVERYTHING GOES WRONG.....
        if (map.graphics.graphic.length > 1) {
          var graExtent = esri.graphicsExtent(map.graphics.graphics); 
           map.setExtent(map.graphic[0].feature.geometry.getExtent());
        }
        else if (map.graphics.graphic.count == 1) {
          map.setExtent(map.graphic[0].feature.geometry.getExtent());
        }
         }); 
      }

      dojo.addOnLoad(init);

Re: Cannot zoom to graphic

KenBuja — Tue, 11 Mar 2014 21:56:11 GMT

A single point essentially does not have an extent. Take a look at this thread which shows how to zoom to a single point.

Re: Cannot zoom to graphic

williamcarr — Wed, 12 Mar 2014 18:05:49 GMT

Thanks for the reply, Ken.

I'm still not getting any luck using extents. Would it be easier to to use a centerAt or a centerAndZoom?

Re: Cannot zoom to graphic

williamcarr — Fri, 10 Dec 2021 23:31:01 GMT

I got it fixed.

 //add graphics to map
           map.graphics.clear();
          map.graphics.add(graphic);
       map.centerAndZoom(graphic.geometry, 15);

I think this will only handle single feature graphics from a query, but it is exactly what I needed.

Re: Cannot zoom to graphic

sumitzarkar — Thu, 13 Mar 2014 12:27:36 GMT

If you have multiple features then you need to add those features to Graphicslayer and get the FullExtent of that GraphicsLayer and set that extent to map.

Re: Cannot zoom to graphic

KenBuja — Thu, 13 Mar 2014 14:56:28 GMT

William, you should mark your post as the answer to help those who are searching for a solution to this question.