Store the track with Geolocation API

ChristianSailer2 — Thu, 07 May 2015 15:14:57 GMT

I'm trying to apply the coordinates of the tracking made by the Geolocation API.

http://tests.christiansailer.ch/omleth_dozent/tripmeter/esri.htm

Unfortunately it doesn't add the records of the Graphic with the function applyEdit in the way I did with Attributes.

Can sb. help?

Thx.

Code is:

function initFunc(map) {

	var startPos;

	if( navigator.geolocation ) {
	navigator.geolocation.getCurrentPosition(zoomToLocation, locationError);
	watchId = navigator.geolocation.watchPosition(showLocation, locationError);
	} else {
	alert("Browser doesn't support Geolocation. Visit http://caniuse.com to see browser support for the Geolocation API.");
	}
	}

	function locationError(error) {
	//error occurred so stop watchPosition
	if( navigator.geolocation ) {
	navigator.geolocation.clearWatch(watchId);
	}
	switch (error.code) {
	case error.PERMISSION_DENIED:
	alert("Location not provided");
	break;

	case error.POSITION_UNAVAILABLE:
	alert("Current location not available");
	break;

	case error.TIMEOUT:
	alert("Timeout");
	break;

	default:
	alert("unknown error");
	break;
	}
	}
	var positionLayerURL = "http://services1.arcgis.com/i9MtZ1vtgD3gTnyL/arcgis/rest/services/OMLETH_Trackers_20150505/FeatureServer/0";

	var positionLayer = new FeatureLayer(positionLayerURL,
	{mode: FeatureLayer.MODE_ONDEMAND,
	outFields: ["*"]
	}
	);





	function zoomToLocation(location) {

	startPos = location;
	var pt = new Point(location.coords.longitude, location.coords.latitude);
	dojo.byId("startLat").innerHTML = location.coords.latitude;
	dojo.byId("startLon").innerHTML = location.coords.longitude;
	addGraphic(pt);
	map.centerAndZoom(pt, 12);
	}

	function showLocation(location) {
	//zoom to the users location and add a graphic
	var pt = new Point([location.coords.longitude, location.coords.latitude],new SpatialReference({ wkid:4326 }));
	var graphic = new Graphic(pt);

	if ( !graphic ) {
	addGraphic(pt);




	} else { // move the graphic if it already exists
	graphic.setGeometry(pt);

	console.log(positionLayer);
	console.log(graphic);
	console.log(positionLayerURL);

	//applyEdits
	positionLayer.applyEdits([graphic],null, null, function(){
	console.log("updateXY");

	}, function(){
	alert("An error occured during update.");
	});


	}
	map.centerAt(pt);

Re: Store the track with Geolocation API

TomSellsted — Sat, 11 Dec 2021 16:56:02 GMT

Christian,

When you create the new graphic, it needs to have a reference to attributes, even if they are blank. For example:

var att = {};
var graphic = new Graphic(pt,null,att);

Without a reference to an attribute, it will fail.

Regards,

Tom

topic Store the track with Geolocation API in ArcGIS JavaScript Maps SDK Questions

Store the track with Geolocation API

Re: Store the track with Geolocation API