Hi All,
Here is one question about U-Turns.
After set the restrictUTurns as "esriNFSBNoBacktrack" (means U-Turn is not allowed), there still could be "Make a U-Turn" in driving directions. How to avoid it ?
Besides, in the example code, there is a "Make a U-turn" from stop 1 to stop 2.
However, there is "Turn left ... " and "Turn left ... " from stop 3 to stop 4.
How to distinguish these two difference scenarios?
You can reproduce this issue by the following code.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<link rel="stylesheet" href="https://js.arcgis.com/4.29/esri/themes/light/main.css">
<script src="https://js.arcgis.com/4.29/"></script>
<title>U-Turn Directions</title>
<style>
html, body, #viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<script>
require(["esri/Map",
"esri/views/MapView",
"esri/layers/RouteLayer",
"esri/rest/support/Stop",
"esri/widgets/Directions"],
function (Map, MapView, RouteLayer, Stop, Directions) {
(async () =>
{
const apiKey = <YOUR_API_KEY>; // Replace with your api key.
const center = [-73.9056, 42.8041];
const stops = [
new Stop({ geometry: { x: -73.905003, y: 42.803639 }, name: "Stop 1", locationType: "stop", sequence: 1, curbApproach: "right-side-of-vehicle" }),
new Stop({ geometry: { x: -73.905278, y: 42.803887 }, name: "Stop 2", locationType: "stop", sequence: 2, curbApproach: "right-side-of-vehicle" }),
new Stop({ geometry: { x: -73.906477, y: 42.804605 }, name: "Stop 3", locationType: "stop", sequence: 3, curbApproach: "right-side-of-vehicle" }),
new Stop({ geometry: { x: -73.906614, y: 42.804673 }, name: "Stop 4", locationType: "stop", sequence: 4, curbApproach: "right-side-of-vehicle" })
];
const routeLayer = new RouteLayer({ stops });
const map = new Map({
basemap: "streets-vector",
layers: [routeLayer]
});
const view = new MapView({
map: map,
container: "viewDiv",
zoom: 16,
center: center
});
const directionsWidget = new Directions({
apiKey: apiKey,
view: view,
layer: routeLayer
});
view.ui.add(directionsWidget, {
position: "top-right"
});
await Promise.all([view.when(), routeLayer.load(), directionsWidget.when()]);
const restrictUTurns = "no-backtrack"; // U-Turn is not allowed
const routeParameters = { apiKey, restrictUTurns }
const results = await routeLayer.solve(routeParameters);
routeLayer.update(results);
await view.goTo(routeLayer.routeInfo.geometry);
})();
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
The driving directions given by ArcGIS Pro (3.2.1) is different to the ArcGIS Online.
Is there anything I missed for the U-Turns?
Environment
ArcGIS Online
JavaScript API 4.29 (latest)
ArcGIS Pro (3.2.1)
Thanks,
Leo
