GetNoDataMask Method

Gets the NoData mask for the given plane from this pixel block. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public Array GetNoDataMask( 
   int plane,
   bool makeCopy
)

Public Function GetNoDataMask( _
   ByVal plane As Integer, _
   ByVal makeCopy As Boolean _
) As Array

Parameters

plane: Index of a plane from this pixel block
makeCopy: Flag that indicates whether to get the NoData mask by reference (false) or value (true).

Return Value

An array representing the NoData mask for this plane.

Remarks

Conceptually, a NoData mask is a two-dimensional array in which each element corresponds to a pixel in the raster. Each element can have a value of 1 or 0; 1 indicates the pixel is a value pixel and 0 means the pixel is NoData. In order to save space, the NoData mask is actually stored as a one-dimensional array of byte. Each byte is used to represent NoData mask values for 8 correspondent pixels. If the image (or SafeArray) has an dimension of nxn, the length of the array returned from NoDataMask will be (n* n+7)/7

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

Reference

PixelBlock Class
PixelBlock Members