Location widget , visualising location accuracy

LakshmiPriyadharshini — Thu, 14 Apr 2022 13:27:50 GMT

Is it possible to show location accuracy in map like location headsup while rotating mobile as it is shown in below image?

Please provide the solution to get this 'blue-cone' in arcgis map.

Re: Location widget , visualising location accuracy

ReneRubalcava — Thu, 14 Apr 2022 16:02:25 GMT

This was kind of fun to do. Geolocation coordinates return an accuracy in meters.

https://developer.mozilla.org/en-US/docs/Web/API/GeolocationCoordinates/accuracy

You can use this value with the view resolution to figure out the size of the marker you want to display.

https://developers.arcgis.com/javascript/latest/api-reference/esri-views-View.html#resolution

I think I did this math right, I'm sure someone will correct if I didn't.

track.on("track", ({ position }) => { accuracy = position.coords.accuracy; currentCoords = position.coords; // divide accuracty (meters) by maps resolution (pixels) const size = `${accuracy / view.resolution}px`; symbol.size = size; layer.removeAll(); layer.add({ geometry: { type: "point", latitude: currentCoords.latitude, longitude: currentCoords.longitude }, symbol }); });

https://codepen.io/odoe/pen/zYpmEMB?editors=1000

The Geolocation API also returns a heading you can use to rotate you symbol, which would be simplest, or you could calculate how to draw a short line in that heading. I'll leave that up to you.

https://developer.mozilla.org/en-US/docs/Web/API/GeolocationCoordinates/heading

topic Re: Location widget , visualising location accuracy in ArcGIS JavaScript Maps SDK Questions

Location widget , visualising location accuracy

Re: Location widget , visualising location accuracy