topic Converting coordinates to route params in ArcGIS JavaScript Maps SDK Questions

Converting coordinates to route params

EvonFranklin — Mon, 11 Jun 2018 21:40:04 GMT

How can i convert coordinates to routeparam compatible stops in order to carry out a RouteTask?

These coordinates are coming from the browser geolocation. Currently when i click on a point and then use the geolocation from the browser I get an error from attempting to solve the route, however when i click on 2 separate points the route solves successfully.

let stop = new Graphic({
 geometry: new Point(position.coords.longitude,position.coords.latitude),
 symbol: stopSymbol
 });
 routeParams.stops.features.push(stop);   

Re: Converting coordinates to route params

RobertScheitlin__GISP — Sun, 12 Dec 2021 03:02:05 GMT

Evon,

I would add a spatial reference.

let stop = new Graphic({
  geometry: new Point(position.coords.longitude,position.coords.latitude, new SpatialReference({ wkid: 4326 })‍),
  symbol: stopSymbol
});
routeParams.stops.features.push(stop);‍‍‍‍‍‍‍‍‍‍

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 14:13:26 GMT

Let me go try that now, but if it is something so simple I am going to beat myself lol. I don't know why i wouldn't think of that.

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 14:17:33 GMT

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 14:39:44 GMT

Actually adding a spatial reference to the point object, results in the point not being symbolized on the map at all

Re: Converting coordinates to route params

RobertScheitlin__GISP — Sun, 12 Dec 2021 03:02:07 GMT

Try this then:

let pnt = new Point(position.coords.longitude,position.coords.latitude, new SpatialReference({ wkid: 4326 }));
let stop = new Graphic(pnt, stopSymbol);
routeParams.stops.features.push(stop);‍‍‍‍‍‍‍

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 16:10:05 GMT

Still not working, if i click and add two points it will work but it seems the calculated geo position from the browser longitude and latitude just doesn't convert at all.

let stop = new Graphic({

geometry: new Point(position.coords.longitude,position.coords.latitude),

symbol: stopSymbol

});

This part here

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 16:18:16 GMT

The point shows up on the map, it just won't carry out the routing

Re: Converting coordinates to route params

RobertScheitlin__GISP — Tue, 12 Jun 2018 17:55:50 GMT

Evon,

This is pretty strange. I wonder if it is the fact that the geoloaction graphic is WGS84 and the other graphics in the stops array are WebMercator 102100.

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 18:16:31 GMT

That could be the case, because the routing works when i manually click two points. At the same time though Robert, the symbol for the marker (the black cross) shows up at the right point on the map. This is crazy, can I just add the point to the stops.features?

Re: Converting coordinates to route params

RobertScheitlin__GISP — Tue, 12 Jun 2018 18:40:38 GMT

Yes you can but it believe it will expect that all stops be in the same WKID. So just use webmercatorutils geographictowebmercator

https://developers.arcgis.com/javascript/3/jsapi/esri.geometry.webmercatorutils-amd.html#geographictowebmercator

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 18:56:02 GMT

I am going to try that right now, should I pass in the new geom object to the stops array in the routeparams?

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 19:07:44 GMT

This indeed works, so in order to use coordinates you have to convert the geometry to webmercator geometry first then push that to the routes params. Esri should make a note of this, or amend it in future releases. thanks for pointing out the suggestions I was stumped.

Re: Converting coordinates to route params

RobertScheitlin__GISP — Tue, 12 Jun 2018 19:16:30 GMT

Evon,

I don't think they have to be in Web Mercator it is just the fact that all the stops have to be in the same WKID.

Re: Converting coordinates to route params

EvonFranklin — Tue, 12 Jun 2018 19:22:37 GMT

Ok I see, i guess the clicked points were not in the same wkid then.

Re: Converting coordinates to route params

RobertScheitlin__GISP — Tue, 12 Jun 2018 19:32:00 GMT

Evon,

Correct the clicked points would be created in the WKID of the Map. Which if you are using a standard esri basemap means that it would be WKID 102100 and the browsers geolocation will always be WKID 4326.