topic Re: Zoom To Point?? in ArcGIS JavaScript Maps SDK Questions

Zoom To Point??

EmilyLaMunyon — Tue, 13 Dec 2011 15:22:12 GMT

Hello,

I am working on a map that displays data in a dojo grid and when the user selects the row, it zooms to the feature on the map. There are points and polygons and the polygons are zoomed to correctly, however, the points are highlighting on the map, but not zooming in at all. Any help would be greatly appreciated!!:o

} else if (searchType == "PointName") { 
   var clickedTaxLotId = grid4.getItem(evt.rowIndex).POINT_NAME; 
   var selectedTaxLot; 
   dojo.forEach(map.graphics.graphics,function(graphic){ 
     if((graphic.attributes) && graphic.attributes.POINT_NAME === clickedTaxLotId){ 
    selectedTaxLot = graphic; 
    //added this part to build infotemplate
     map.infoWindow.setTitle(graphic.getTitle()); 
     map.infoWindow.setContent(graphic.getContent());
      //
    return; 
     } 
        }); 
  
   if ( selectedTaxLot.geometry.declaredClass == 'esri.geometry.Point' ) {
   //alert("Point");
   map.centerAt(selectedTaxLot.geometry);
   var sp = map.toScreen(selectedTaxLot.geometry);
   map.infoWindow.show(selectedTaxLot.geometry, map.getInfoWindowAnchor(sp));
   } else {
   //alert("Polygon");
   var taxLotExtent = selectedTaxLot.geometry.getExtent(); 
   var screenpoint = map.toScreen(selectedTaxLot.geometry.getExtent().getCenter());
   var mappoint = map.toMap(screenpoint);
    //map.centerAt(mappoint);
    //added by Emily
    map.centerAndZoom(selectedTaxLot.geometry,11);
   
   map.infoWindow.show(taxLotExtent.getCenter(), map.getInfoWindowAnchor(screenpoint));
   }
  }

Re: Zoom To Point??

JeffPace — Sat, 11 Dec 2021 06:22:34 GMT

} else if (searchType == "PointName") { 
   var clickedTaxLotId = grid4.getItem(evt.rowIndex).POINT_NAME; 
   var selectedTaxLot; 
   dojo.forEach(map.graphics.graphics,function(graphic){ 
     if((graphic.attributes) && graphic.attributes.POINT_NAME === clickedTaxLotId){ 
    selectedTaxLot = graphic; 
    //added this part to build infotemplate
     map.infoWindow.setTitle(graphic.getTitle()); 
     map.infoWindow.setContent(graphic.getContent());
      //
    return; 
     } 
        }); 
  
   if ( selectedTaxLot.geometry.declaredClass == 'esri.geometry.Point' ) {
   //alert("Point");
   map.centerAt(selectedTaxLot.geometry);
   var sp = map.toScreen(selectedTaxLot.geometry);
   map.infoWindow.show(selectedTaxLot.geometry, map.getInfoWindowAnchor(sp));
   } else {
   //alert("Polygon");
   var taxLotExtent = selectedTaxLot.geometry.getExtent(); 
   var screenpoint = map.toScreen(selectedTaxLot.geometry.getExtent().getCenter());
   var mappoint = map.toMap(screenpoint);
    //map.centerAt(mappoint);
    //added by Emily
    map.centerAndZoom(selectedTaxLot.geometry,11);
   
   map.infoWindow.show(taxLotExtent.getCenter(), map.getInfoWindowAnchor(screenpoint));
   }
  }

That is because you are calling "centerAt" so all it does is pan. Since a point has no Extent, you need to tell it what level to go to

you could try "centerAndZoom" i.e

map.centerAndZoom(pt, level)

Re: Zoom To Point??

EmilyLaMunyon — Tue, 13 Dec 2011 16:51:10 GMT

Thanks Jeff, that did the trick!!