Offline routing

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This sample demonstrates how to solve a route on-the-fly using offline data.

screenshot

How to use the sample

Click near a road to start adding a stop to the route, click again to place it on the map. A number graphic will show its order in the route. After adding at least 2 stops, a route will display. Choose "Fastest" or "Shortest" to control how the route is optimized. To move a stop, click on the graphic, and while continuing to press on the graphic, move the mouse to reposition. Release the mouse to set the new position. The route will update on-the-fly while moving stops. The green box marks the boundary of the route geodatabase.

How it works

To display a Route using a RouteTask with offline data:

  1. Create the map's Basemap from a local tile package using a TileCache and ArcGISTiledLayer
  2. Create a RouteTask with an offline locator geodatabase
  3. Get the RouteParameters using routeTask.createDefaultParameters()
  4. Create Stops and add them to the route task's parameters.
  5. Solve the Route using routeTask.solveRoute(routeParameters)
  6. Create a graphic with the route's geometry and a SimpleLineSymbol and display it on another GraphicsOverlay.

Relevant API

  • RouteParameters
  • RouteResult
  • RouteTask
  • Stop
  • TravelMode

Offline data

The data used by this sample is available on ArcGIS Online.

Link Local Location
San Diego Streets TPK <userhome>/ArcGIS/Runtime/Data/tpk/san_diego

About the data

This sample uses a pre-packaged sample dataset consisting of a geodatabase with a San Diego road network and a tile package with a streets basemap.

Tags

connectivity, disconnected, fastest, locator, navigation, network analysis, offline, routing, routing, shortest, turn-by-turn

Sample Code

OfflineRouting.qml
                                                                                                                                                                                                                                                          
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// [WriteFile Name=OfflineRouting, Category=Routing]
// [Legal]
// Copyright 2020 Esri.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick 2.6
import QtQuick.Controls 2.6
import Esri.ArcGISRuntime 100.11
import Esri.ArcGISExtras 1.1
import QtQml 2.11
import QtQuick.Layouts 1.11

Rectangle {
    id: rootRectangle
    clip: true
    width: 800
    height: 600

    readonly property url dataPath: System.userHomePath + "/ArcGIS/Runtime/Data/tpk/"
    readonly property url pinUrl: "qrc:/Samples/Routing/OfflineRouting/orange_symbol.png"
    property var findRoute;
    property Graphic selectedGraphic: null;

    MapView {
        id: mapView
        anchors.fill: parent
        focus: false

        RowLayout {
            anchors {
                left: parent.left
                top: parent.top
            }
            ComboBox {
                id: comboBox
                Layout.fillWidth: true
                onCurrentIndexChanged: {
                    routeTask.findRoute();
                }
            }
            Button {
                text: "Reset"
                Layout.fillWidth: true
                onClicked: {
                    stopsOverlay.graphics.clear();
                    routeOverlay.graphics.clear();
                    selectedGraphic = null;
                }
            }
        }

        Map {
            minScale: 100000
            Basemap {
                ArcGISTiledLayer {
                    TileCache {
                        path: dataPath + "san_diego/streetmap_SD.tpk"
                    }
                }
            }
        }

        GraphicsOverlay {
            id: stopsOverlay
        }

        GraphicsOverlay {
            id: routeOverlay
            renderer: SimpleRenderer {
                SimpleLineSymbol {
                    style: Enums.SimpleLineSymbolStyleSolid
                    color: "blue"
                    width: 2
                }
            }
        }

        PictureMarkerSymbol {
            id: pinSymbol
            url: pinUrl
            height: 50
            width: 50
            offsetY: height/2
        }

        GraphicsOverlay {
            id: boundaryOverlay
            Graphic {
                Envelope {
                    id: routableArea
                    xMin: -13045352.223196
                    xMax: -13024588.857198
                    yMin: 3864910.900750
                    yMax: 3838880.505604
                    SpatialReference {wkid: 3857}
                }
                SimpleLineSymbol {
                    style: Enums.SimpleLineSymbolStyleDash
                    color: "lime"
                    width: 3
                }
            }
        }

        RouteTask {
            id: routeTask
            url: dataPath + "san_diego/sandiego.geodatabase"
            networkName: "Streets_ND"

            onComponentCompleted: {
                load();
            }

            onLoadStatusChanged: {
                if (loadStatus === Enums.LoadStatusLoaded) {
                    // assign ComboBox model from travel mode names
                    const modesList = routeTask.routeTaskInfo.travelModes;
                    const travelModeNames = [];
                    for (let i = 0; i < modesList.length; i++) {
                        travelModeNames.push(modesList[i].name);
                    }
                    comboBox.model = travelModeNames;
                    createDefaultParameters();
                }
            }

            function findRoute() {
                if (routeTask.solveRouteStatus === Enums.TaskStatusInProgress)
                    return;

                if (createDefaultParametersResult === null)
                    return;

                const routeParameters = createDefaultParametersResult;
                const stopsList = [];
                const numGraphics = stopsOverlay.graphics.count;
                if (numGraphics > 1) {
                    for (let i = 0; i < numGraphics; i++) {
                        const tempStop = ArcGISRuntimeEnvironment.createObject("Stop", {geometry: stopsOverlay.graphics.get(i).geometry});
                        stopsList.push(tempStop);
                    }
                    routeParameters.setStops(stopsList);
                    routeParameters.travelMode = routeTask.routeTaskInfo.travelModes[comboBox.currentIndex];

                    routeTask.solveRoute(routeParameters);
                }
            }

            onErrorChanged: {
                console.log(routeTask.error.message, routeTask.error.additionalMessage);
            }

            onSolveRouteStatusChanged: {
                if (solveRouteStatus === Enums.TaskStatusCompleted) {
                    // clear old route
                    routeOverlay.graphics.clear();
                    if (routeTask.error) {
                        console.warn(routeTask.error.message);
                    }
                    const routeGraphic = ArcGISRuntimeEnvironment.createObject("Graphic", {geometry: solveRouteResult.routes[0].routeGeometry});
                    routeOverlay.graphics.append(routeGraphic);
                }
            }
        }

        onIdentifyGraphicsOverlayStatusChanged: {
            if (identifyGraphicsOverlayStatus !== Enums.TaskStatusCompleted)
                return;

            if (identifyGraphicsOverlayResult === null) {
                return;
            }

            if (identifyGraphicsOverlayResult.graphics.length === 0) {
                selectedGraphic = null;
            } else {
                const index = stopsOverlay.graphics.indexOf(identifyGraphicsOverlayResult.graphics[0]);
                selectedGraphic = stopsOverlay.graphics.get(index);
            }
        }

        // check whether mouse pressed over an existing stop
        onMousePressed: {
            mapView.identifyGraphicsOverlay(stopsOverlay, mouse.x, mouse.y, 10, false);
        }

        // get stops from clicked locations and find route
        onMouseClicked: {
            if (!selectedGraphic) {
                const clickedPoint = mapView.screenToLocation(mouse.x, mouse.y);
                if (!GeometryEngine.within(clickedPoint, routableArea)) {
                    console.warn("Outside of routable area");
                    return;
                }
                const textSymbol = ArcGISRuntimeEnvironment.createObject("TextSymbol", {color: "white",
                                                                            horizontalAlignment: Enums.HorizontalAlignmentCenter,
                                                                            verticalAlignment: Enums.VerticalAlignmentBottom,
                                                                            size: 20, text: stopsOverlay.graphics.count + 1});
                textSymbol.offsetY = pinSymbol.height/2;
                const stopSymbol = ArcGISRuntimeEnvironment.createObject("CompositeSymbol");
                stopSymbol.symbols.append(pinSymbol);
                stopSymbol.symbols.append(textSymbol);

                const stopGraphic = ArcGISRuntimeEnvironment.createObject("Graphic", {geometry: clickedPoint, symbol: stopSymbol});
                stopsOverlay.graphics.append(stopGraphic);
                routeTask.findRoute();
            }
            mouse.accepted = true;
        }

        // if mouse is moved while pressing on a graphic, the click-and-pan effect of the MapView is prevented by mouse.accepted = true
        // and the mouse position is tracked and route is updated on-the-fly
        onMousePositionChanged: {
            mouse.accepted = !!selectedGraphic; // whether to pass mouse event to MapView
            if (selectedGraphic) {
                if (!GeometryEngine.within(mapView.screenToLocation(mouse.x, mouse.y), routableArea)) {
                    console.warn("Outside of routable area");
                    return;
                }
                selectedGraphic.geometry = mapView.screenToLocation(mouse.x, mouse.y);
                routeTask.findRoute();
            }
        }

        // mouseMoved is processed before identifyGraphicsOverlayCompleted, so must clear graphic upon mouseReleased
        onMouseReleased: {
            if (selectedGraphic) {
                selectedGraphic = null;
                mouse.accepted = true;
            }
        }
    }

    BusyIndicator {
        anchors.centerIn: parent
        visible: true
        running: routeTask.taskStatus === Enums.TaskStatusInProgress
    }
}

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