DK11 for ActiveX | TatukGIS_XDK11.TGIS_StatisticsPixel | Classes | Methods | Properties

Statistics class for raster layers.

Available also on: Delphi | .NET | Java.

// C#
public class TGIS_StatisticsPixel : ITGIS_StatisticsPixel, ITGIS_StatisticsLayerEvents 
{
}

' VisualBasic
Public Class TGIS_StatisticsPixel
  Implements ITGIS_StatisticsPixel
  Implements ITGIS_StatisticsLayerEvents
End Class

// Oxygene
type
  TGIS_StatisticsPixel = public class
  end;

ITGIS_StatisticsPixel ITGIS_StatisticsLayerEvents

This class inherits from TGIS_StatisticsAbstract and is specialised for pixel layers, e.g.:

• AddAllBands method,
• To avoid long calculation on big images, FastStatistics property is set to True by default. It means that the statistics engine uses resampling for pixel layers greater than 2048 x 2048 cells. In this case, results are approximate with high accuracy. Set False to compute fully accurate statistics.

See:

• TGIS_StatisticsAbstract

Pseudocode:

// layer.Statistics is an instance of TGIS_StatisticsAbstract so casting is needed
stats = TGIS_StatisticsPixel(layer.Statistics);

// add all bands from pixel layer
stats.AddAllBands(TGIS_StatisticalFunctions.BasicStatistics);

stats.Calculate;

// demand a result
stats_result = stats.Get(<valid_name>);

Valid names are 'A', 'R', 'G', 'B', 'H', 'S', 'L' for images and 'Value' for grid (listed in stats.AvailableResults list).

Use later like in TGIS_Abstract example.