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/***********************************************/
/**
* @file griddedTopographyEllipsoidal2Radial.cpp
*
* @brief Interpolate digital terrain models from ellipoidal heights to radial heights.
*
* @author Torsten Mayer-Guerr
* @date 2013-10-22
*/
/***********************************************/
// Latex documentation
#define DOCSTRING docstring
static const char *docstring = R"(
Interpolate digital terrain models from ellipoidal heights to radial heights.
)";
/***********************************************/
#include "programs/program.h"
#include "files/fileGriddedData.h"
#include "misc/miscGriddedData.h"
/***** CLASS ***********************************/
/** @brief Interpolate digital terrain models from ellipoidal heights to radial heights.
* @ingroup programsGroup */
class GriddedTopographyEllipsoidal2Radial
{
public:
void run(Config &config, Parallel::CommunicatorPtr comm);
};
GROOPS_REGISTER_PROGRAM(GriddedTopographyEllipsoidal2Radial, SINGLEPROCESS, "Interpolate digital terrain models from ellipoidal heights to radial heights", Grid)
/***********************************************/
void GriddedTopographyEllipsoidal2Radial::run(Config &config, Parallel::CommunicatorPtr /*comm*/)
{
try
{
FileName fileNameOutGrid, fileNameInGrid;
readConfig(config, "outputfileGriddedData", fileNameOutGrid, Config::OPTIONAL, "", "");
readConfig(config, "inputfileGriddedData", fileNameInGrid, Config::MUSTSET, "", "Digital Terrain Model");
if(isCreateSchema(config)) return;
// read grid
// ---------
logStatus<<"read grid from file <"<<fileNameInGrid<<">"<<Log::endl;
GriddedDataRectangular grid;
readFileGriddedData(fileNameInGrid, grid);
MiscGriddedData::printStatistics(grid);
std::vector<Angle> lambda, phi;
std::vector<Double> radius;
grid.geocentric(lambda, phi, radius);
const Double direction = ((phi.back() > phi.front()) ? +1 : -1); // north to south or vice versa
logStatus<<"linear interpolation of elevation data"<<Log::endl;
Double maxPhiShift = 0.0;
Double maxHeightShift = 0.0;
Single::forEach(grid.longitudes.size(), [&](UInt k)
{
Vector heightOld = grid.values.at(0).column(k);
std::vector<Angle> phiTop(grid.latitudes.size()); // spherical latitude at top of topography
for(UInt i=0; i<phi.size(); i++)
phiTop.at(i) = grid.ellipsoid(grid.longitudes.at(k), grid.latitudes.at(i), heightOld(i)).phi();
// linear interpolation
for(UInt i=0; i<phi.size(); i++)
{
// find interval
const UInt idx = std::min(i + (direction*(phi.at(i)-phiTop.at(i)) > 0), phiTop.size()-1);
const Double w = (phi.at(i)-phiTop.at(idx-1)) / (phiTop.at(idx)-phiTop.at(idx-1));
grid.values.at(0)(i,k) = w * heightOld(idx) + (w-1) * heightOld(idx-1);
maxPhiShift = std::max(maxPhiShift, std::fabs(phiTop.at(i)-phi.at(i)));
maxHeightShift = std::max(maxHeightShift, std::fabs(grid.values.at(0)(i,k)-heightOld(i)));
}
});
logInfo<<" max. shifted latitude: "<<maxPhiShift*RAD2DEG<<"°"<<Log::endl;
logInfo<<" max. height change: "<<maxHeightShift<<" m"<<Log::endl;
// write new grid
// --------------
if(!fileNameOutGrid.empty())
{
logStatus<<"write grid to file <"<<fileNameOutGrid<<">"<<Log::endl;
writeFileGriddedData(fileNameOutGrid, grid);
}
}
catch(std::exception &e)
{
GROOPS_RETHROW(e)
}
}
/***********************************************/
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