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Apply an RGB renderer to a raster layer to enhance feature visibility.
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.
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.
Create a Raster from a from a multispectral raster file.
Create a RasterLayer from the raster.
Create a Basemap from the raster layer and set it to the map.
Create an RGBRenderer, specifying the StretchParameters and other properties.
Apply the renderer to the raster layer.
Basemap
Raster
RasterLayer
RGBRenderer
StretchParameters
This sample downloads the following items from ArcGIS Online automatically:
The raster used in this sample shows an area in the south of the Shasta-Trinity National Forest, California.
analysis, color, composite, imagery, multiband, multispectral, pan-sharpen, photograph, raster, spectrum, stretch, visualization
RasterRgbRenderer.xaml RasterRgbRenderer.xaml RasterRgbRenderer.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>
