All docs
V21.2
21.2
21.1
20.2
The page you are viewing does not exist in version 20.2. This link will take you to the root page.
20.1
The page you are viewing does not exist in version 20.1. This link will take you to the root page.
19.2
The page you are viewing does not exist in version 19.2. This link will take you to the root page.
19.1
The page you are viewing does not exist in version 19.1. This link will take you to the root page.
18.2
The page you are viewing does not exist in version 18.2. This link will take you to the root page.
18.1
The page you are viewing does not exist in version 18.1. This link will take you to the root page.
17.2
The page you are viewing does not exist in version 17.2. This link will take you to the root page.

BingRouteIsochroneOptions.DistanceUnit Property

Gets or sets the distance measurement unit for which an isochrone is calculated.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v21.2.dll

Declaration

public DistanceMeasureUnit DistanceUnit { get; set; }

Property Value

Type Description
DistanceMeasureUnit

The distance measurement unit. The default value is Kilometer.

Available values:

Name Description
Kilometer

All distances are measured in kilometers.

Mile

All distances are measured in miles.

Property Paths

You can access this nested property as listed below:

Object Type Path to DistanceUnit
BingRouteIsochroneDataProvider
.IsochroneOptions.DistanceUnit

Remarks

Specify the DistanceUnit property to set the measurement unit for the distance that you pass to the CalculateIsochroneByDistance method parameters.

Example

The following code plots a polygon that shows the area that is accessible from the specified point. The size of the area depends on a given travel distance (the distance is equal to 10 kilometers in the example below):

A distance-based isochrone

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:IsochroneMap"
        xmlns:dxm="http://schemas.devexpress.com/winfx/2008/xaml/map" 
        x:Class="IsochroneMap.MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">
    <Grid>
        <dxm:MapControl x:Name="mapControl">
            <dxm:ImageLayer>
                <dxm:BingMapDataProvider BingKey="Insert your Bing key." 
                                          Kind="RoadLight" />
            </dxm:ImageLayer>
            <dxm:InformationLayer x:Name="infoLayer">
                <dxm:BingRouteIsochroneDataProvider x:Name="isochroneProvider" 
                                                    BingKey="Insert your Bing key."
                                                    GenerateLayerItems="False"
                                                    IsochroneCalculated="OnIsochroneCalculated">
                    <dxm:BingRouteIsochroneDataProvider.IsochroneOptions>
                        <dxm:BingRouteIsochroneOptions Mode="Driving" 
                                                    DistanceUnit="Kilometer"/>
                    </dxm:BingRouteIsochroneDataProvider.IsochroneOptions>
                </dxm:BingRouteIsochroneDataProvider>
            </dxm:InformationLayer>
        </dxm:MapControl>
    </Grid>
</Window>
using DevExpress.Xpf.Map;
using System.Windows;
using System.Windows.Media;

namespace IsochroneMap {
    public partial class MainWindow : Window {
        public MainWindow() {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e) {
            GeoPoint origin = new GeoPoint(42.3589935302734, -71.0586318969727);
            isochroneProvider.CalculateIsochroneByDistance(new RouteWaypoint("Origin", origin), 10);
        }

        private void OnIsochroneCalculated(object sender, BingRouteIsochroneCalculatedEventArgs e) {
            foreach (var polygon in e.CalculationResult.IsochroneResult.Polygons) {
                MapPolyline item = new MapPolyline();
                foreach (var points in polygon.Coordinates)
                    item.Points.Add(points);
                item.StrokeStyle = new StrokeStyle { Thickness = 4 };
                item.Stroke = Brushes.Red;

                MapPushpin pushpin = new MapPushpin { Location = e.CalculationResult.IsochroneResult.Origin, Brush = Brushes.Red };

                VectorLayer vectorLayer = new VectorLayer();
                mapControl.Layers.Add(vectorLayer);
                MapItemStorage storage = new MapItemStorage();
                vectorLayer.Data = storage;
                storage.Items.Add(item);
                storage.Items.Add(pushpin);
            }
            mapControl.ZoomToFitLayerItems();
        }
    }
}
See Also