topic Re: javascript geocoder returning incorrect coordinates in ArcGIS JavaScript Maps SDK Questions

javascript geocoder returning incorrect coordinates

JustinShepard — Sat, 22 Nov 2014 05:13:59 GMT

I was testing the geocoder from the ArcGIS JavaScript API today and noticed some odd behavior. Simply it boils down to if I run the geocoder manually (ie. type the search criteria into the text box and then press enter) then it returns as expected with the result spatial reference and extent matching. However, if I run the geocoder by code (ie. dynamically build the search criteria from other user inputs and pass in the search criteria to the geocoder) then it returns the spatial reference in Web Mercator and the extent coordinates in WGS84. The problem with this is that when I zoom to the result from a find result coming from a code approach the map zooms to the wrong location.

Do I need to do something different to the geocoder when passing in search criteria by code?

after creating a geocoder I set up a handler for the "find-results"

on(geocoder, "find-results", function (geocodeResults) {

console.log(geocoder);

console.log("geocode results");

console.log(geocodeResults);

console.log("geocode results - first extent");

geocoder.select(geocodeResults.results.results[0]);

console.log("map");

console.log(map);

});

for the find by code approach here's how it is handled

geocoder.value = 'California, United States';

geocoder.find();

using the same search criteria here are the results from the code and manual approaches:

Results from code

extent: Object

spatialReference: Object

latestWkid: 3857

wkid: 102100

__proto__: Object

type: "extent"

xmax: -114.131258

xmin: -125.371258

ymax: 42.87022

ymin: 31.63022

Results from manual

extent: Object

spatialReference: Object

latestWkid: 3857

wkid: 102100

__proto__: Object

type: "extent"

xmax: -12705033.52415573

xmin: -13956264.600672128

ymax: 5292238.823753822

ymin: 3714868.5338891055

Re: javascript geocoder returning incorrect coordinates

RahulMetangale2 — Sat, 22 Nov 2014 05:21:17 GMT

Justin,

Have you tried setting outSpatialreference property on geocoder to map.spatialreference?

Sent from my Windows Phone

Re: javascript geocoder returning incorrect coordinates

JustinShepard — Sun, 23 Nov 2014 03:57:19 GMT

The API doesn't have anywhere to set the output spatial reference for the geocoder's find() method, geocoder-amd | API Reference | ArcGIS API for JavaScript. If you know where I could set the output spatial reference for the geocoder that would be great.

Re: javascript geocoder returning incorrect coordinates

KellyHutchins — Sun, 12 Dec 2021 06:52:26 GMT

Justin,

The issue is that the map probably isn't loaded when you set the value for the geocoder so it doesn't know the map SR. Waiting for the geocoder to load should resolve the issue because the geocoder handles checking for hte map load. Here's a bit of code that shows this workflow.

Also note that instead of setting the value using geocoder.value we use set instead.


        geocoder = new Geocoder({ 
          map: map 
        }, "search");
        geocoder.startup();
        on(geocoder, "load", function(){
          geocoder.set("value","California, United States");
          geocoder.find();
          on(geocoder, "find-results", function(result){
            console.log(result)
          });
        });

Re: javascript geocoder returning incorrect coordinates

JustinShepard — Tue, 25 Nov 2014 00:56:41 GMT

Thanks. I finally stumbled upon that today. I was still surprised that the spatial reference and extent values didn't align. I was expecting it to throw an error instead of returning unmatched values.

What is the advantage to using geocoder.set instead of geocoder.value?

Re: javascript geocoder returning incorrect coordinates

KellyHutchins — Tue, 25 Nov 2014 17:09:59 GMT

Justin,

Using set instead of directly setting the value is a cleaner more consistent form of interacting with the widget's properties. There's a bit more info on using set/get in the following tutorial from dojo. Look at the note section in the 'Getters and Setters' portion of the doc.

Understanding _WidgetBase - The Dojo Toolkit