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UsngGrid Constructor

Initializes a new instance of the UsngGrid class.

Namespace:  Esri.ArcGISRuntime.UI
Assembly:  Esri.ArcGISRuntime (in Esri.ArcGISRuntime.dll) Version: 100.11.0
Syntax
public UsngGrid()
Remarks
Constructs an USNG grid for displaying on a map view. The grid is supported in spatial references which are continuously pannable or some polar spatial references. You can check the IsPannable property is true on your spatial reference. Examples of continuously pannable spatial references include WGS84 (WKID 4326) and Web Mercator Auxiliary Sphere (WKID 102113, 102100, or 3857). The following polar spatial references are also supported: North pole Azimuthal Equidistant (WKID 102016), North pole gnomic (WKID 102034), North pole lambert equal area (WKID 102017), North pole orthographic (WKID 102035), North pole stereographic (WKID 102018), NSIDC EASE North (WKID 3408), NSIDC Sea Ice polar stereographic north (WKID 3411), WGS 1984 NSIDC Sea Ice Polar Stereographic North (WKID 3413), UPS North (WKID 32661), South pole Azimuthal Equidistant (WKID 102019), South pole gnomic (WKID 102036), South pole lambert equal area (WKID 102020), South pole orthographic (WKID 102037), South pole stereographic (WKID 102021), NSIDC EASE South (WKID 3409), NSIDC Sea Ice polar stereographic South (WKID 3412), UPS South (WKID 32761), WGS1984 Antarctic polar stereographic (WKID 3031).
Examples

WPF

Example Name: DisplayGrid

Display coordinate system grids including Latitude/Longitude, MGRS, UTM and USNG on a map view. Also, toggle label visibility and change the color of grid lines and grid labels.

Code example screen shot.

C#
// Copyright 2018 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.

using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Symbology;
using Esri.ArcGISRuntime.UI;
using System;
using System.Windows;
using System.Windows.Controls;
using Esri.ArcGISRuntime.Geometry;
using Colors = System.Drawing.Color;
using Grid = Esri.ArcGISRuntime.UI.Grid;

namespace ArcGISRuntime.WPF.Samples.DisplayGrid
{
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Display grid",
        category: "MapView",
        description: "Display coordinate system grids including Latitude/Longitude, MGRS, UTM and USNG on a map view. Also, toggle label visibility and change the color of grid lines and grid labels.",
        instructions: "Select type of grid from the types (LatLong, MGRS, UTM and USNG) and modify its properties like label visibility, grid line color, and grid label color. Press the button to apply these settings.",
        tags: new[] { "MGRS", "USNG", "UTM", "coordinates", "degrees", "graticule", "grid", "latitude", "longitude", "minutes", "seconds" })]
    public partial class DisplayGrid
    {
        public DisplayGrid()
        {
            InitializeComponent();

            Initialize();
        }

        private void Initialize()
        {
            // Set up the map view with a basemap.
            MyMapView.Map = new Map(BasemapStyle.ArcGISImagery);

            // Configure the UI options.
            GridTypeCombo.ItemsSource = new[] {"LatLong", "MGRS", "UTM", "USNG"};
            Colors[] colorItemsSource = {Colors.Red, Colors.Green, Colors.Blue, Colors.White, Colors.Purple};
            GridColorCombo.ItemsSource = colorItemsSource;
            LabelColorCombo.ItemsSource = colorItemsSource;
            HaloColorCombo.ItemsSource = colorItemsSource;
            LabelPositionCombo.ItemsSource = Enum.GetNames(typeof(GridLabelPosition));
            LabelFormatCombo.ItemsSource = Enum.GetNames(typeof(LatitudeLongitudeGridLabelFormat));
            ComboBox[] boxes = {GridTypeCombo, GridColorCombo, LabelColorCombo, HaloColorCombo, LabelPositionCombo, LabelFormatCombo};
            foreach (ComboBox combo in boxes)
            {
                combo.SelectedIndex = 0;
            }

            // Update the halo color so it isn't the same as the text color.
            HaloColorCombo.SelectedIndex = 3;

            // Subscribe to change events so the label format combo can be disabled as necessary.
            GridTypeCombo.SelectionChanged += (o, e) =>
            {
                LabelFormatCombo.IsEnabled = GridTypeCombo.SelectedItem.ToString() == "LatLong";
            };

            // Subscribe to the button click event.
            ApplySettingsButton.Click += ApplySettingsButton_Click;

            // Enable the action button.
            ApplySettingsButton.IsEnabled = true;

            // Zoom to a default scale that will show the grid labels if they are enabled.
            MyMapView.SetViewpointCenterAsync(
                new MapPoint(-7702852.905619, 6217972.345771, SpatialReferences.WebMercator), 23227);

            // Apply default settings.
            ApplySettingsButton_Click(this, null);
        }

        private void ApplySettingsButton_Click(object sender, RoutedEventArgs e)
        {
            Grid grid;

            // First, update the grid based on the type selected.
            switch (GridTypeCombo.SelectedValue.ToString())
            {
                case "LatLong":
                    grid = new LatitudeLongitudeGrid();
                    // Apply the label format setting.
                    string selectedFormatString = LabelFormatCombo.SelectedValue.ToString();
                    ((LatitudeLongitudeGrid) grid).LabelFormat =
                        (LatitudeLongitudeGridLabelFormat) Enum.Parse(typeof(LatitudeLongitudeGridLabelFormat),
                            selectedFormatString);
                    break;

                case "MGRS":
                    grid = new MgrsGrid();
                    break;

                case "UTM":
                    grid = new UtmGrid();
                    break;
                case "USNG":
                default:
                    grid = new UsngGrid();
                    break;
            }

            // Next, apply the label visibility setting.
            grid.IsLabelVisible = LabelVisibilityCheckbox.IsChecked.Value;
            grid.IsVisible = GridVisibilityCheckbox.IsChecked.Value;

            // Next, apply the grid color and label color settings for each zoom level.
            for (long level = 0; level < grid.LevelCount; level++)
            {
                // Set the line symbol.
                Symbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid,
                    (Colors) GridColorCombo.SelectedValue, 2);
                grid.SetLineSymbol(level, lineSymbol);

                // Set the text symbol.
                Symbol textSymbol = new TextSymbol
                {
                    Color = (Colors) LabelColorCombo.SelectedValue,
                    OutlineColor = (Colors) HaloColorCombo.SelectedValue,
                    Size = 16,
                    HaloColor = (Colors) HaloColorCombo.SelectedValue,
                    HaloWidth = 3
                };
                grid.SetTextSymbol(level, textSymbol);
            }

            // Next, apply the label position setting.
            grid.LabelPosition =
                (GridLabelPosition) Enum.Parse(typeof(GridLabelPosition), LabelPositionCombo.SelectedValue.ToString());

            // Apply the updated grid.
            MyMapView.Grid = grid;
        }
    }
}
XAML
<UserControl
    x:Class="ArcGISRuntime.WPF.Samples.DisplayGrid.DisplayGrid"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:esri="http://schemas.esri.com/arcgis/runtime/2013"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="300">
    <UserControl.Resources>
        <Style TargetType="ComboBox">
            <Setter Property="Margin" Value="5" />
        </Style>
        <Style TargetType="Button">
            <Setter Property="Margin" Value="5" />
        </Style>
    </UserControl.Resources>
    <Grid>
        <esri:MapView x:Name="MyMapView" />
        <Border Style="{StaticResource BorderStyle}">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="Auto" />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="2*" />
                </Grid.ColumnDefinitions>
                <!-- Labels -->
                <Label Content="Grid type"
                       Grid.Row="0" Grid.Column="0" />
                <Label Content="Show grid"
                       Grid.Row="1" Grid.Column="0" />
                <Label Content="Show labels"
                       Grid.Row="2" Grid.Column="0" />
                <Label Content="Grid color"
                       Grid.Row="3" Grid.Column="0" />
                <Label Content="Label color"
                       Grid.Row="4" Grid.Column="0" />
                <Label Content="Halo color"
                       Grid.Row="5" Grid.Column="0" />
                <Label Content="Label position"
                       Grid.Row="6" Grid.Column="0" />
                <Label Content="Label format"
                       Grid.Row="7" Grid.Column="0" />
                <!-- Inputs -->
                <ComboBox x:Name="GridTypeCombo"
                          Grid.Row="0" Grid.Column="1" />
                <CheckBox x:Name="GridVisibilityCheckbox"
                          IsChecked="True" Margin="5"
                          Grid.Row="1" Grid.Column="1" />
                <CheckBox x:Name="LabelVisibilityCheckbox"
                          IsChecked="True" Margin="5"
                          Grid.Row="2" Grid.Column="1" />
                <ComboBox x:Name="GridColorCombo"
                          Grid.Row="3" Grid.Column="1" />
                <ComboBox x:Name="LabelColorCombo"
                          Grid.Row="4" Grid.Column="1" />
                <ComboBox x:Name="HaloColorCombo"
                          Grid.Row="5" Grid.Column="1" />
                <ComboBox x:Name="LabelPositionCombo"
                          Grid.Row="6" Grid.Column="1" />
                <ComboBox x:Name="LabelFormatCombo"
                          Grid.Row="7" Grid.Column="1" />
                <!-- Apply -->
                <Button x:Name="ApplySettingsButton"
                        Grid.Row="8" Grid.Column="0" Grid.ColumnSpan="2"
                        Content="Apply settings"
                        IsEnabled="False" />
            </Grid>
        </Border>
    </Grid>
</UserControl>
See Also
Additional Examples
Hyperlink to ExampleDescription
DisplayGridDisplay coordinate system grids including Latitude/Longitude, MGRS, UTM and USNG on a map view. Also, toggle label visibility and change the color of grid lines and grid labels.