topic Zoom to Graphics Layer? in ArcGIS JavaScript Maps SDK Questions

Zoom to Graphics Layer?

ZachLiu1 — Wed, 07 Aug 2013 20:41:23 GMT

So I have a group of graphics displayed on map, does anyone know how to center and zoom to those graphics?

I guess I need to play with the Extent objects but do not have a clear mind to do this.

Thanks:D

Re: Zoom to Graphics Layer?

JasonZou — Wed, 07 Aug 2013 22:00:09 GMT

var extGraphics = esri.graphicsExtent(inGraphics);
map.setExtent(extGraphics)

where inGraphics is the array of the graphics you like to zoom to. Hope this helps.

Re: Zoom to Graphics Layer?

ZachLiu1 — Thu, 08 Aug 2013 12:07:57 GMT

This is much easier than I expected. I remember I did something similar with Google Map API and I have to update the extent of each graphic to a overall extent object. Thanks very much!:D

Re: Zoom to Graphics Layer?

JasonZou — Thu, 08 Aug 2013 13:19:12 GMT

Glad to be able to help:)

Re: Zoom to Graphics Layer?

ZachLiu1 — Sun, 12 Dec 2021 07:47:47 GMT

I know this code works generally, but when I tied to use it after executing a query task, I can not set map extent to the returned graphics layer. Don't know what goes wrong.

function showResults(featureSet){
                //remove all graphics on the maps graphics layer
                map.graphics.clear();

                //Performance enhancer - assign featureSet array to a single variable.
                var resultFeatures = featureSet.features;

                $.each(resultFeatures, function(index, featureItem){
                    featureItem.setSymbol(symbol);
                    featureItem.setInfoTemplate(infoTemplate);
                    map.graphics.add(featureItem);
                });

                var extGraphics = GraphicsUtils.graphicsExtent(map.graphics.graphics);
                map.setExtent(extGraphics);
            }

Re: Zoom to Graphics Layer?

JasonZou — Tue, 13 Aug 2013 18:06:01 GMT

var extGraphics = GraphicsUtils.graphicsExtent(map.graphics.graphics);
Check extGraphics value after executing the above line. If the value is not what you expected, check map.graphics.graphics to see how many graphics there. To be safe, I would use featureSet to get the graphics array.

Re: Zoom to Graphics Layer?

ZachLiu1 — Tue, 13 Aug 2013 18:17:05 GMT

My bad:(. I typed GraphicUtils instead of GraphicsUtils when I loaded the module.

The featureSet seems not a graphics list though, I used featureSet.features now.

Thanks!:D