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api:dk11:delphi:gislayerpixel.tgis_layerpixel.prepareminmaxzgray_double

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TGIS_LayerPixel.prepareMinMaxZGray method

DK11 for Delphi | GisLayerPixel.TGIS_LayerPixel.prepareMinMaxZGray | Constructors | Fields | Methods | Properties | Events

Scan image to prepare min/max value of altitude when interpreting RGB as single channel "AsGrid".

Available also on: .NET | Java.

Syntax

// Delphi
protected
  procedure prepareMinMaxZGray(
    const _zoom : Double = -1
  ); virtual;
// C++ Builder
protected:
  virtual void prepareMinMaxZGray(
    const double _zoom
  );

Parameters

Name Type Description
_zoom Double will calculate value only for a given zoom; will increase the speed but calculation will not be exact; if -1 then will scale to the 200 pixels size
2020/05/07 01:08

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