I am trying to add some functionality that will zoom the map in/out depending on the points that are returned from a query. So for example, say we're zoomed in on the state of Texas. If I execute a query and the service returns back points that are in Texas AND some located in California, I would like the map to then zoom out and then display both California and Texas. I have been looking through the ArcGIS JS API to see how I could implement it but I'm having trouble figuring out what properties and/or methods to use to accomplish this.
3 Answers
Not a good idea to create an extent from a point that way. If the units are in degrees you could get a huge extent. Instead, you could do a buffer around the point using the geometryEngine
function onQueryComplete(featureSet){
if (featureSet.features.length) {
var extent = esri.graphicsUtils.graphicsExtent(featureSet.features);
if(!extent && featureSet.features.length == 1 && featureSet.features[0].geometry.type == "point") {
var point = featureSet.features[0];
var extent = esri.geometry.geometryEngine.buffer(point.geometry, 1, "meters").getExtent();
}
// assumes the esri map object is stored in the globally-scoped variable 'map'
map.setExtent(extent)
}
}
Related