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Add python bindings for QgsAlignRaster

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wonder-sk committed Jun 12, 2015
1 parent 1409f08 commit d6d2f1a374e5553216462d45649e974ce74d9867
Showing with 121 additions and 2 deletions.
  1. +1 −0 python/analysis/analysis.sip
  2. +118 −0 python/analysis/raster/qgsalignraster.sip
  3. +2 −2 src/analysis/raster/qgsalignraster.h
@@ -34,6 +34,7 @@
%Include interpolation/qgsidwinterpolator.sip
%Include interpolation/qgstininterpolator.sip

%Include raster/qgsalignraster.sip
%Include raster/qgsderivativefilter.sip
%Include raster/qgsaspectfilter.sip
%Include raster/qgshillshadefilter.sip
@@ -0,0 +1,118 @@

class QgsAlignRaster
{
%TypeHeaderCode
#include <qgsalignraster.h>
%End

public:
QgsAlignRaster();

//! Utility class for gathering information about rasters
struct RasterInfo
{
public:
//! Construct raster info with a path to a raster file
RasterInfo( const QString& layerpath );
~RasterInfo();

//! Check whether the given path is a valid raster
bool isValid() const;

//! Return CRS in WKT format
QByteArray crs() const;
//! Return size of the raster grid in pixels
QSize rasterSize() const;
//! Return number of raster bands in the file
int bandCount() const;
//! Return cell size in map units
QSizeF cellSize() const;
//! Return grid offset
QPointF gridOffset() const;
//! Return extent of the raster
QgsRectangle extent() const;

//! write contents of the object to standard error stream - for debugging
void dump() const;

//! Get raster value at the given coordinates (from the first band)
double identify( double mx, double my );
};


//! Resampling algorithm to be used (equivalent to GDAL's enum GDALResampleAlg)
enum ResampleAlg
{
RA_NearestNeighbour = 0, //!< Nearest neighbour (select on one input pixel)
RA_Bilinear = 1, //!< Bilinear (2x2 kernel)
RA_Cubic = 2, //!< Cubic Convolution Approximation (4x4 kernel)
RA_CubicSpline = 3, //!< Cubic B-Spline Approximation (4x4 kernel)
RA_Lanczos = 4, //!< Lanczos windowed sinc interpolation (6x6 kernel)
RA_Average = 5, //!< Average (computes the average of all non-NODATA contributing pixels)
RA_Mode = 6 //!< Mode (selects the value which appears most often of all the sampled points)
};

//! Definition of one raster layer for alignment
struct Item
{
Item( const QString& input, const QString& output );

//! filename of the source raster
QString inputFilename;
//! filename of the newly created aligned raster (will be overwritten if exists already)
QString outputFilename;
//! resampling method to be used
QgsAlignRaster::ResampleAlg resampleMethod;
//! rescaling of values according to the change of pixel size
bool rescaleValues;

// private part

//! used for rescaling of values (if necessary)
double srcCellSizeInDestCRS;
};
typedef QList<QgsAlignRaster::Item> List;

//! Set list of rasters that will be aligned
void setRasters( const List& list );
//! Get list of rasters that will be aligned
List rasters() const;

void setGridOffset( const QPointF& offset );
QPointF gridOffset() const;

//! Set output cell size
void setCellSize( double x, double y );
//! Set output cell size
void setCellSize( const QSizeF& size );
//! Get output cell size
QSizeF cellSize() const;

// TODO: first need to run determineTransformAndSize() before this
//QSize rasterSize() const { return QSize(mXSize, mYSize); }
// TODO: add method for access to final extent

//! Configure clipping extent (region of interest).
//! No extra clipping is done if the rectangle is null
void setClipExtent( double xmin, double ymin, double xmax, double ymax );
//! Configure clipping extent (region of interest).
//! No extra clipping is done if the rectangle is null
void setClipExtent( const QgsRectangle& extent );
//! Get clipping extent (region of interest).
//! No extra clipping is done if the rectangle is null
QgsRectangle clipExtent() const;

//! Set destination CRS, cell size and grid offset from a raster file
void setParametersFromRaster( const RasterInfo& rasterInfo );
//! Set destination CRS, cell size and grid offset from a raster file
void setParametersFromRaster( const QString& filename );

//! Run the alignment process
//! @return true on success
bool run();

//! write contents of the object to standard error stream - for debugging
void dump() const;

};

@@ -85,7 +85,7 @@ class ANALYSIS_EXPORT QgsAlignRaster


//! Resampling algorithm to be used (equivalent to GDAL's enum GDALResampleAlg)
typedef enum
enum ResampleAlg
{
RA_NearestNeighbour = 0, //!< Nearest neighbour (select on one input pixel)
RA_Bilinear = 1, //!< Bilinear (2x2 kernel)
@@ -94,7 +94,7 @@ class ANALYSIS_EXPORT QgsAlignRaster
RA_Lanczos = 4, //!< Lanczos windowed sinc interpolation (6x6 kernel)
RA_Average = 5, //!< Average (computes the average of all non-NODATA contributing pixels)
RA_Mode = 6 //!< Mode (selects the value which appears most often of all the sampled points)
} ResampleAlg;
};

//! Definition of one raster layer for alignment
struct Item

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