RGB renderer

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Apply an RGB renderer to a raster layer to enhance feature visibility.

Image of RGB renderer

Use case

An RGB renderer is used to adjust the color bands of a multispectral image. Remote sensing images acquired from satellites often contain values representing the reflection of multiple spectrums of light. Changing the RGB renderer of such rasters can be used to differentiate and highlight particular features that reflect light differently, such as different vegetation types, or turbidity in water.

How to use the sample

Choose one of the stretch parameter types. The other options will adjust based on the chosen type. Add your inputs and select the 'Update' button to update the renderer.

How it works

  1. Create a Raster from a from a multispectral raster file.
  2. Create a RasterLayer from the raster.
  3. Create a Basemap from the raster layer and set it to the map.
  4. Create an RGBRenderer, specifying the StretchParameters and other properties.
  5. Apply the renderer to the raster layer.

Relevant API

  • Basemap
  • Raster
  • RasterLayer
  • RGBRenderer
  • StretchParameters

Offline data

This sample downloads the following items from ArcGIS Online automatically:

About the data

The raster used in this sample shows an area in the south of the Shasta-Trinity National Forest, California.

Tags

analysis, color, composite, imagery, multiband, multispectral, pan-sharpen, photograph, raster, spectrum, stretch, visualization

Sample Code

RasterRgbRenderer.xamlRasterRgbRenderer.xaml.cs
                                                                                                                                                                                                                             
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage
    x:Class="ArcGISRuntime.Samples.RasterRgbRenderer.RasterRgbRenderer"
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:esriUI="clr-namespace:Esri.ArcGISRuntime.Xamarin.Forms;assembly=Esri.ArcGISRuntime.Xamarin.Forms"
    Title="Raster RGB renderer">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="220" />
        </Grid.RowDefinitions>
        <esriUI:MapView x:Name="MyMapView" Grid.Row="0" />
        <Grid
            Grid.Row="1"
            HorizontalOptions="Center"
            VerticalOptions="CenterAndExpand"
            WidthRequest="400">
            <Grid.RowDefinitions>
                <RowDefinition Height="40" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition />
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
            <StackLayout
                Grid.Row="0"
                Grid.Column="0"
                Grid.ColumnSpan="2"
                Orientation="Horizontal">
                <Label
                    Margin="10,0,3,0"
                    HorizontalOptions="End"
                    MinimumWidthRequest="80"
                    Text="Stretch: "
                    VerticalOptions="CenterAndExpand" />
                <Picker
                    x:Name="StretchTypeComboBox"
                    SelectedIndexChanged="StretchTypeSelectionChanged"
                    VerticalOptions="CenterAndExpand" />
            </StackLayout>
            <Grid
                x:Name="MinMaxParametersGrid"
                Grid.Row="1"
                Grid.Column="0"
                Grid.ColumnSpan="4"
                Margin="0,10"
                IsVisible="True">
                <Grid.RowDefinitions>
                    <RowDefinition />
                    <RowDefinition />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>
                <Label
                    Grid.Row="0"
                    Grid.Column="0"
                    Margin="0,0,3,0"
                    HorizontalOptions="End"
                    Text="Min: "
                    VerticalOptions="CenterAndExpand" />
                <Picker
                    x:Name="MinRedComboBox"
                    Grid.Row="0"
                    Grid.Column="1"
                    HeightRequest="40"
                    HorizontalOptions="Center"
                    TextColor="Red"
                    VerticalOptions="CenterAndExpand"
                    WidthRequest="80" />
                <Picker
                    x:Name="MinGreenComboBox"
                    Grid.Row="0"
                    Grid.Column="2"
                    HeightRequest="40"
                    HorizontalOptions="Center"
                    TextColor="Green"
                    VerticalOptions="CenterAndExpand"
                    WidthRequest="80" />
                <Picker
                    x:Name="MinBlueComboBox"
                    Grid.Row="0"
                    Grid.Column="3"
                    HeightRequest="40"
                    HorizontalOptions="Center"
                    TextColor="Blue"
                    VerticalOptions="CenterAndExpand"
                    WidthRequest="80" />
                <Label
                    Grid.Row="1"
                    Grid.Column="0"
                    Margin="0,0,3,0"
                    HorizontalOptions="End"
                    Text="Max: "
                    VerticalOptions="CenterAndExpand" />
                <Picker
                    x:Name="MaxRedComboBox"
                    Grid.Row="1"
                    Grid.Column="1"
                    HeightRequest="40"
                    HorizontalOptions="Center"
                    TextColor="Red"
                    VerticalOptions="CenterAndExpand"
                    WidthRequest="80" />
                <Picker
                    x:Name="MaxGreenComboBox"
                    Grid.Row="1"
                    Grid.Column="2"
                    HeightRequest="40"
                    HorizontalOptions="Center"
                    TextColor="Green"
                    VerticalOptions="CenterAndExpand"
                    WidthRequest="80" />
                <Picker
                    x:Name="MaxBlueComboBox"
                    Grid.Row="1"
                    Grid.Column="3"
                    HeightRequest="40"
                    HorizontalOptions="Center"
                    TextColor="Blue"
                    VerticalOptions="CenterAndExpand"
                    WidthRequest="80" />
            </Grid>
            <Grid
                x:Name="PercentClipParametersGrid"
                Grid.Row="1"
                Grid.Column="0"
                Grid.ColumnSpan="4"
                IsVisible="False">
                <Grid.RowDefinitions>
                    <RowDefinition />
                    <RowDefinition />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition />
                    <ColumnDefinition Width="3*" />
                </Grid.ColumnDefinitions>
                <Label
                    Grid.Row="0"
                    Grid.Column="0"
                    HorizontalOptions="Center"
                    Text="Min %: "
                    VerticalOptions="CenterAndExpand" />
                <Slider
                    x:Name="MinimumValueSlider"
                    Grid.Row="0"
                    Grid.Column="1"
                    Margin="20,0"
                    Maximum="100"
                    MaximumTrackColor="CadetBlue"
                    Minimum="0"
                    MinimumTrackColor="CadetBlue"
                    VerticalOptions="CenterAndExpand" />
                <Label
                    Grid.Row="1"
                    Grid.Column="0"
                    HorizontalOptions="Center"
                    Text="Max %: "
                    VerticalOptions="CenterAndExpand" />
                <Slider
                    x:Name="MaximumValueSlider"
                    Grid.Row="1"
                    Grid.Column="1"
                    Margin="20,0"
                    Maximum="100"
                    MaximumTrackColor="CadetBlue"
                    Minimum="0"
                    MinimumTrackColor="CadetBlue"
                    VerticalOptions="CenterAndExpand" />
            </Grid>
            <Grid
                x:Name="StdDeviationParametersGrid"
                Grid.Row="1"
                Grid.Column="0"
                Grid.ColumnSpan="4"
                IsVisible="False">
                <Grid.RowDefinitions>
                    <RowDefinition Height="20" />
                    <RowDefinition />
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="120" />
                    <ColumnDefinition Width="100" />
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>
                <Label
                    Grid.Row="1"
                    Grid.Column="0"
                    HorizontalOptions="Center"
                    Text="Factor: "
                    VerticalOptions="CenterAndExpand" />
                <Picker
                    x:Name="StdDeviationFactorComboBox"
                    Grid.Row="1"
                    Grid.Column="1"
                    Grid.ColumnSpan="2"
                    HorizontalOptions="Start"
                    VerticalOptions="CenterAndExpand"
                    WidthRequest="60" />
            </Grid>
            <Button
                x:Name="ApplyRgbRendererButton"
                Grid.Row="2"
                Grid.Column="1"
                Grid.ColumnSpan="2"
                Margin="0,5"
                Clicked="ApplyRgbRendererButton_Clicked"
                HeightRequest="40"
                HorizontalOptions="Center"
                IsEnabled="False"
                Text="Apply renderer"
                VerticalOptions="End" />
        </Grid>
    </Grid>
</ContentPage>