ArcGIS Runtime SDK for WPF - Library Reference
StdvValues Property
See Also  Example
ESRI.ArcGIS.Client Namespace > ArcGISImageServiceLayer Class : StdvValues Property

Gets the standard deviation of all the numerical value for each band in an ArcGISImageServiceLayer.

Syntax

Visual Basic (Declaration) 
Public ReadOnly Property StdvValues As Double()
C# 
public double[] StdvValues {get;}

Remarks

Images are made up of one or more bands. Each band has a single measurable characteristic (such as temperature, elevation, electromagnetic spectrum value, etc.) per pixel. Depending on how the statistics are created for the ArcGISImageServiceLayer the NoData value may or may not be included in the calculation of the standard deviation for each band. Contact the author of the ArcGISImageServiceLayer to determine how the statistics were created.

Theoretical information related to imagery can be found for the following topics:

Example

C#Copy Code
private void MainPage_Loaded(object sender, System.Windows.RoutedEventArgs e)
{
  
  // The Map1 object (a Map object) was defined previously in XAML.
  
  // Create an ArcGISImageServiceLayer.
  ESRI.ArcGIS.Client.ArcGISImageServiceLayer myArcGISImageServiceLayer = new ESRI.ArcGIS.Client.ArcGISImageServiceLayer();
  myArcGISImageServiceLayer.Url = "http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Portland/CascadeLandsat/ImageServer";
            
  // Create an Event Handler.
  myArcGISImageServiceLayer.Initialized += new System.EventHandler<EventArgs>(ArcGISImageServiceLayer_Intialized);
                 
  // Add the ArcGISImageServiceLayer to the LayerCollection of the Map.
  Map1.Layers.Add(myArcGISImageServiceLayer);
                 
}
                 
private void ArcGISImageServiceLayer_Intialized(object sender, EventArgs e)
{
                 
  // The Map1 object (a Map object) and TextBlock_StdValues (a TextBlock object) were defined previously in XAML.
                 
  // Access a specific ArcGISImageServiceLayer.
  ESRI.ArcGIS.Client.ArcGISImageServiceLayer myArcGISImageServiceLayer = (ESRI.ArcGIS.Client.ArcGISImageServiceLayer)Map1.Layers[0];
                 
  // StdValues (Read Only)
  System.Double[] myStdValues = myArcGISImageServiceLayer.StdValues;
  if (myStdValues != null)
  {
    string myStdValuesText = "Num StdValues: " + myStdValues.Length.ToString();
    string myStdValuesText2 = "";
    int i2 = 0;
    for (i2 = 0; i2 < myStdValues.Length; i2++)
    {
      myStdValuesText2 = myStdValuesText2 + " " + myStdValues[i2].ToString();
    }
    TextBlock_StdValues.Text = myStdValuesText + ". StdValues: " + myStdValuesText2;
  }
  else
  {
    TextBlock_StdValues.Text = "[NO StdValues SET]";
  }
                 
}
VB.NETCopy Code
Private Sub MainPage_Loaded(ByVal sender As Object, ByVal e As System.Windows.RoutedEventArgs) Handles Me.Loaded
                 
  ' The Map1 object (a Map object) was defined previously in XAML.
                 
  ' Create an ArcGISImageServiceLayer.
  Dim myArcGISImageServiceLayer As New ESRI.ArcGIS.Client.ArcGISImageServiceLayer
  myArcGISImageServiceLayer.Url = "http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Portland/CascadeLandsat/ImageServer"
                 
  ' Create an Event Handler.
  AddHandler myArcGISImageServiceLayer.Initialized, AddressOf ArcGISImageServiceLayer_Intialized
                 
  ' Add the ArcGISImageServiceLayer to the LayerCollection of the Map.
  Map1.Layers.Add(myArcGISImageServiceLayer)
                 
End Sub
                 
Private Sub ArcGISImageServiceLayer_Intialized(ByVal sender As Object, ByVal e As EventArgs)
                 
  ' The Map1 object (a Map object) and TextBlock_StdValues (a TextBlock object) were defined previously in XAML.
                 
  ' Access a specific ArcGISImageServiceLayer.
  Dim myArcGISImageServiceLayer As ESRI.ArcGIS.Client.ArcGISImageServiceLayer = Map1.Layers.Item(0)
  
  ' StdValues (Read Only)
  Dim myStdValues() As System.Double = myArcGISImageServiceLayer.StdValues
  If myStdValues IsNot Nothing Then
    Dim myStdValuesText As String = "Num StdValues: " + myStdValues.Length.ToString
    Dim myStdValuesText2 As String = ""
    Dim i2 As Integer
    For i2 = 0 To myStdValues.Length - 1
      myStdValuesText2 = myStdValuesText2 + " " + myStdValues(i2).ToString
    Next
    TextBlock_StdValues.Text = myStdValuesText + ". StdValues: " + myStdValuesText2
  Else
    TextBlock_StdValues.Text = "[NO StdValues SET]"
  End If
                 
End Sub

Requirements

Target Platforms: Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family, Windows 7, Windows 8

See Also

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