Ignore less acurate updates

cmd/ot-browser/ot-browser.go

@@ -31,6 +31,16 @@ func mqtt_recv(id string, loc Location) {
 	if !loc.IsPlausible() { // Ignore stupid locations
 		return
 	}
+	if old, ok := devices[id]; ok { // if we already have a location
+		if loc.Acc > old.Acc {
+			// Ignore, if the new location is less precise, and the old one lies within it's accuracy
+			// This might happen, if there is a provider switch on the phone (e.g. GPX -> coarse location)
+			distance := old.Distance(loc)
+			if distance <= loc.Acc {
+				return
+			}
+		}
+	}
 	devices[id] = loc
 }