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/**********************************************************************
ImgRasterGdal.cc: class to read raster files using GDAL API library
Copyright (C) 2008-2012 Pieter Kempeneers
This file is part of pktools
pktools is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
pktools is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with pktools. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************/
#include <iostream>
#include "ogr_spatialref.h"
#include "ImgRasterGdal.h"
ImgRasterGdal::ImgRasterGdal(void)
: m_gds(NULL), m_ncol(0), m_nrow(0), m_nband(0), m_dataType(GDT_Unknown)
{}
ImgRasterGdal::~ImgRasterGdal(void)
{
}
void ImgRasterGdal::close(void)
{
GDALClose(m_gds);
}
/**
* @return the projection of this data set in string format
**/
std::string ImgRasterGdal::getProjection(void) const
{
// if(m_gds)
// return(m_gds->GetProjectionRef());
// else
return(m_projection);
}
/**
* @return the projection of this data set in string format
**/
std::string ImgRasterGdal::getProjectionRef(void) const
{
// if(m_gds)
// return(m_gds->GetProjectionRef());
// else
return(m_projection);
}
/**
* @param projection projection string to be used for this dataset
* @return the projection of this data set in string format
**/
CPLErr ImgRasterGdal::setProjectionProj4(const std::string& projection)
{
OGRSpatialReference theRef;
theRef.SetFromUserInput(projection.c_str());
char *wktString;
theRef.exportToWkt(&wktString);
m_projection=wktString;
if(m_gds)
return(m_gds->SetProjection(wktString));
else
return(CE_Failure);
}
/**
* @param projection projection string to be used for this dataset
**/
CPLErr ImgRasterGdal::setProjection(const std::string& projection)
{
m_projection=projection;
if(m_gds)
return(m_gds->SetProjection(projection.c_str()));
else
return(CE_Failure);
}
/**
* @param band get data type for this band (start counting from 0)
* @return the GDAL data type of this data set for the selected band
**/
GDALDataType ImgRasterGdal::getDataType(int band) const
{
assert(band<m_nband+1);
if(getRasterBand(band))
return((getRasterBand(band)->GetRasterDataType()));
else
return(m_dataType);
}
/**
* @param band get GDAL raster band for this band (start counting from 0)
* @return the GDAL raster band of this data set for the selected band
**/
GDALRasterBand* ImgRasterGdal::getRasterBand(int band) const
{
assert(band<m_nband+1);
if(m_gds)
return((m_gds->GetRasterBand(band+1)));
else
return(0);
}
/**
* @param band get GDAL color table for this band (start counting from 0)
* @return the GDAL color table of this data set for the selected band
**/
GDALColorTable* ImgRasterGdal::getColorTable(int band) const
{
assert(band<m_nband+1);
GDALRasterBand* theRasterBand=getRasterBand(band);
if(theRasterBand)
return(theRasterBand->GetColorTable());
else
return(0);
}
/**
* @return the driver description of this data set in string format
**/
std::string ImgRasterGdal::getDriverDescription() const
{
std::string driverDescription;
if(m_gds)
driverDescription=m_gds->GetDriver()->GetDescription();
return(driverDescription);
}
/**
* @param gt pointer to the six geotransform parameters:
* @param adfGeoTransform[0] top left x
* @param GeoTransform[1] w-e pixel resolution
* @param GeoTransform[2] rotation, 0 if image is "north up"
* @param GeoTransform[3] top left y
* @param GeoTransform[4] rotation, 0 if image is "north up"
* @param GeoTransform[5] n-s pixel resolution
**/
CPLErr ImgRasterGdal::setGeoTransform(double* gt){
// m_isGeoRef=true;
m_gt[0]=gt[0];
m_gt[1]=gt[1];
m_gt[2]=gt[2];
m_gt[3]=gt[3];
m_gt[4]=gt[4];
m_gt[5]=gt[5];
if(m_gds)
return(m_gds->SetGeoTransform(m_gt));
else
return(CE_Failure);
}
/**
* @param imgSrc Use this source image as a template to copy geotranform information
**/
void ImgRasterGdal::copyGeoTransform(const ImgRasterGdal& imgSrc)
{
setProjection(imgSrc.getProjection());
double gt[6];
imgSrc.getGeoTransform(gt);
setGeoTransform(gt);
}
/**
* @param gt pointer to the six geotransform parameters:
* @param adfGeoTransform[0] top left x
* @param GeoTransform[1] w-e pixel resolution
* @param GeoTransform[2] rotation, 0 if image is "north up"
* @param GeoTransform[3] top left y
* @param GeoTransform[4] rotation, 0 if image is "north up"
* @param GeoTransform[5] n-s pixel resolution
**/
void ImgRasterGdal::getGeoTransform(double* gt) const{
// if(m_gds){
// m_gds->GetGeoTransform(gt);
// }
// else{
gt[0]=m_gt[0];
gt[1]=m_gt[1];
gt[2]=m_gt[2];
gt[3]=m_gt[3];
gt[4]=m_gt[4];
gt[5]=m_gt[5];
// }
}
/**
* @return the geotransform of this data set in string format
**/
std::string ImgRasterGdal::getGeoTransform() const
{
std::string gtString;
double gt[6];// { 444720, 30, 0, 3751320, 0, -30 };
getGeoTransform(gt);
std::ostringstream s;
s << "[" << gt[0] << "," << gt[1] << "," << gt[2] << "," << gt[3] << "," << gt[4] << "," << gt[5] << "]";
gtString=s.str();
return(s.str());
}
/**
* @return the metadata of this data set in string format
**/
char** ImgRasterGdal::getMetadata()
{
if(m_gds){
if(m_gds->GetMetadata()!=NULL)
return(m_gds->GetMetadata());
}
else
return (char**)"";
}
/**
* @return the metadata of this data set in C style string format (const version)
**/
char** ImgRasterGdal::getMetadata() const
{
if(m_gds){
if(m_gds->GetMetadata()!=NULL)
return(m_gds->GetMetadata());
}
else
return (char**)"";
}
/**
* @return the metadata of this data set in standard template library (stl) string format
**/
void ImgRasterGdal::getMetadata(std::list<std::string>& metadata) const
{
if(m_gds){
char** cmetadata=m_gds->GetMetadata();
while(*cmetadata!=NULL){
metadata.push_back(*(cmetadata));
++cmetadata;
}
}
}
/**
* @return the description of this data set in string format
**/
std::string ImgRasterGdal::getDescription() const
{
if(m_gds){
if(m_gds->GetDriver()->GetDescription()!=NULL)
return m_gds->GetDriver()->GetDescription();
}
else
return("");
}
/**
* @return the meta data item of this data set in string format
**/
std::string ImgRasterGdal::getMetadataItem() const
{
if(m_gds){
if(m_gds->GetDriver()->GetMetadataItem( GDAL_DMD_LONGNAME )!=NULL)
return m_gds->GetDriver()->GetMetadataItem( GDAL_DMD_LONGNAME );
}
else
return("");
}
/**
* @return the image description (TIFFTAG) of this data set in string format
**/
std::string ImgRasterGdal::getImageDescription() const
{
if(m_gds){
if(m_gds->GetDriver()->GetMetadataItem("TIFFTAG_IMAGEDESCRIPTION")!=NULL)
return m_gds->GetDriver()->GetMetadataItem("TIFFTAG_IMAGEDESCRIPTION");
}
else
return("");
}
/**
* @return the band coding interleave of this data set in string format
**/
std::string ImgRasterGdal::getInterleave() const
{
if(m_gds){
if(m_gds->GetMetadataItem( "INTERLEAVE", "IMAGE_STRUCTURE"))
return m_gds->GetMetadataItem( "INTERLEAVE", "IMAGE_STRUCTURE");
else
return("BAND");
}
else
return("");
}
/**
* @return the compression meta data of this data set in string format
**/
std::string ImgRasterGdal::getCompression() const
{
if(m_gds){
if(m_gds->GetMetadataItem( "COMPRESSION", "IMAGE_STRUCTURE"))
return m_gds->GetMetadataItem( "COMPRESSION", "IMAGE_STRUCTURE");
}
else
return("NONE");
}
/**
* assuming
* adfGeotransform[0]: ULX (upper left X coordinate)
* adfGeotransform[1]: $cos(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[2]: $-sin(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[3]: ULY (upper left Y coordinate)
* adfGeotransform[4]: $-sin(\alpha)\cdot\textrm{Yres}$
* adfGeotransform[5]: $-cos(\alpha)\cdot\textrm{Yres}$
* @param ulx upper left coordinate in x
* @param uly upper left coordinate in y
* @param lrx lower left coordinate in x
* @param lry lower left coordinate in y
* @return true if image is georeferenced
**/
bool ImgRasterGdal::getBoundingBox(double& ulx, double& uly, double& lrx, double& lry) const
{
double gt[6];// { 444720, 30, 0, 3751320, 0, -30 };
getGeoTransform(gt);
ulx=gt[0];
uly=gt[3];
lrx=gt[0]+nrOfCol()*gt[1]+nrOfRow()*gt[2];
lry=gt[3]+nrOfCol()*gt[4]+nrOfRow()*gt[5];
if(isGeoRef())
return true;
else
return false;
}
/**
* assuming
* adfGeotransform[0]: ULX (upper left X coordinate)
* adfGeotransform[1]: $cos(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[2]: $-sin(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[3]: ULY (upper left Y coordinate)
* adfGeotransform[4]: $-sin(\alpha)\cdot\textrm{Yres}$
* adfGeotransform[5]: $-cos(\alpha)\cdot\textrm{Yres}$
* @param x, y centre coordinates in x and y
* @return true if image is georeferenced
**/
bool ImgRasterGdal::getCenterPos(double& x, double& y) const
{
double gt[6];// { 444720, 30, 0, 3751320, 0, -30 };
getGeoTransform(gt);
x=gt[0]+(nrOfCol()/2.0)*gt[1]+(nrOfRow()/2.0)*gt[2];
y=gt[3]+(nrOfCol()/2.0)*gt[4]+(nrOfRow()/2.0)*gt[5];
if(isGeoRef()){
// x=m_ulx+(nrOfCol()/2.0)*m_delta_x;
// y=m_uly-(nrOfRow()/2.0)*m_delta_y;
return true;
}
else
return false;
}
/**
* assuming
* adfGeotransform[0]: ULX (upper left X coordinate)
* adfGeotransform[1]: $cos(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[2]: $-sin(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[3]: ULY (upper left Y coordinate)
* adfGeotransform[4]: $-sin(\alpha)\cdot\textrm{Yres}$
* adfGeotransform[5]: $-cos(\alpha)\cdot\textrm{Yres}$
* @param x,y georeferenced coordinates in x and y
* @param i,j image coordinates (can be fraction of pixels)
* @return true if image is georeferenced
**/
bool ImgRasterGdal::geo2image(double x, double y, double& i, double& j) const
{
double gt[6];// { 444720, 30, 0, 3751320, 0, -30 };
getGeoTransform(gt);
double denom=(gt[1]-gt[2]*gt[4]/gt[5]);
double eps=0.00001;
if(fabs(denom)>eps){
i=(x-gt[0]-gt[2]/gt[5]*(y-gt[3]))/denom;
j=(y-gt[3]-gt[4]*(x-gt[0]-gt[2]/gt[5]*(y-gt[3]))/denom)/gt[5];
}
if(isGeoRef())
return true;
else
return false;
}
/**
* assuming
* adfGeotransform[0]: ULX (upper left X coordinate)
* adfGeotransform[1]: $cos(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[2]: $-sin(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[3]: ULY (upper left Y coordinate)
* adfGeotransform[4]: $-sin(\alpha)\cdot\textrm{Yres}$
* adfGeotransform[5]: $-cos(\alpha)\cdot\textrm{Yres}$
* @param i,j image coordinates (can be fraction of pixels)
* @param x,y georeferenced coordinates in x and y (can be fraction of pixels)
* @return true if image is georeferenced
**/
bool ImgRasterGdal::image2geo(double i, double j, double& x, double& y) const
{
double gt[6];// { 444720, 30, 0, 3751320, 0, -30 };
getGeoTransform(gt);
x=gt[0]+(0.5+i)*gt[1]+(0.5+j)*gt[2];
y=gt[3]+(0.5+i)*gt[4]+(0.5+j)*gt[5];
if(isGeoRef()){
// x=m_ulx+(0.5+i)*m_delta_x;
// y=m_uly-(0.5+j)*m_delta_y;
return true;
}
else
return false;
}
/**
* assuming
* adfGeotransform[0]: ULX (upper left X coordinate)
* adfGeotransform[1]: $cos(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[2]: $-sin(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[3]: ULY (upper left Y coordinate)
* adfGeotransform[4]: $-sin(\alpha)\cdot\textrm{Yres}$
* adfGeotransform[5]: $-cos(\alpha)\cdot\textrm{Yres}$
* @param x,y georeferenced coordinates in x and y
* @return true if image covers the georeferenced location
**/
bool ImgRasterGdal::covers(double x, double y) const
{
double theULX, theULY, theLRX, theLRY;
getBoundingBox(theULX,theULY,theLRX,theLRY);
return((x > theULX)&&
(x < theLRX)&&
(y < theULY)&&
(y >theLRY));
}
/**
* assuming
* adfGeotransform[0]: ULX (upper left X coordinate)
* adfGeotransform[1]: $cos(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[2]: $-sin(\alpha)\cdot\textrm{Xres}$
* adfGeotransform[3]: ULY (upper left Y coordinate)
* adfGeotransform[4]: $-sin(\alpha)\cdot\textrm{Yres}$
* adfGeotransform[5]: $-cos(\alpha)\cdot\textrm{Yres}$
* @param ulx upper left coordinate in x
* @param uly upper left coordinate in y
* @param lrx lower left coordinate in x
* @param lry lower left coordinate in y
* @return true if image (partially) covers the bounding box
**/
bool ImgRasterGdal::covers(double ulx, double uly, double lrx, double lry) const
{
double theULX, theULY, theLRX, theLRY;
getBoundingBox(theULX,theULY,theLRX,theLRY);
return((ulx < theLRX)&&(lrx > theULX)&&(lry < theULY)&&(uly > theLRY));
}
/**
* @param noDataValues standard template library (stl) vector containing no data values
* @return number of no data values in this dataset
**/
int ImgRasterGdal::getNoDataValues(std::vector<double>& noDataValues) const
{
if(m_noDataValues.size()){
noDataValues=m_noDataValues;
return m_noDataValues.size();
}
else
return 0;
}
/**
* @param noDataValue no data value to be pushed for this dataset
* @return number of no data values in this dataset
**/
int ImgRasterGdal::pushNoDataValue(double noDataValue)
{
if(find(m_noDataValues.begin(),m_noDataValues.end(),noDataValue)==m_noDataValues.end())
m_noDataValues.push_back(noDataValue);
return(m_noDataValues.size());
}
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