/
DerivativeWriter.cpp
1702 lines (1449 loc) · 53.9 KB
/
DerivativeWriter.cpp
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/******************************************************************************
* Copyright (c) 2015, Bradley J Chambers, brad.chambers@gmail.com
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Hobu, Inc. or Flaxen Geo Consulting nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
#include "DerivativeWriter.hpp"
#include <pdal/PointView.hpp>
#include <pdal/util/Utils.hpp>
#include <algorithm>
#include <cmath>
#include <iostream>
#include <limits>
#include <boost/filesystem.hpp>
#include "gdal_priv.h" // For File I/O
#include "gdal_version.h" // For version info
#include "ogr_spatialref.h" //For Geographic Information/Transformations
namespace pdal
{
static PluginInfo const s_info = PluginInfo(
"writers.derivative",
"Derivative writer",
"http://pdal.io/stages/writers.derivative.html");
CREATE_STATIC_PLUGIN(1, 0, DerivativeWriter, Writer, s_info)
std::string DerivativeWriter::getName() const
{
return s_info.name;
}
const double c_pi = 3.14159265358979323846; /*!< PI value */
const float c_background = FLT_MIN;
DerivativeWriter::DerivativeWriter() : m_primitive_type(0)
{
GDALAllRegister();
}
void DerivativeWriter::processOptions(const Options& ops)
{
m_GRID_DIST_X = ops.getValueOrDefault<double>("grid_dist_x", 15.0);
m_GRID_DIST_Y = ops.getValueOrDefault<double>("grid_dist_y", 15.0);
}
void DerivativeWriter::initialize()
{
// maybe we eventually introduce an option to do more than slope
//std::vector<Option> types = options.getOptions("output_type");
//if (!types.size())
// m_outputTypes = OUTPUT_TYPE_ALL;
//else
//{
// for (auto i = types.begin(); i != types.end(); ++i)
// {
// if (Utils::iequals(i->getValue<std::string>(), "min"))
// m_outputTypes |= OUTPUT_TYPE_MIN;
// if (Utils::iequals(i->getValue<std::string>(), "max"))
// m_outputTypes |= OUTPUT_TYPE_MAX;
// if (Utils::iequals(i->getValue<std::string>(), "mean"))
// m_outputTypes |= OUTPUT_TYPE_MEAN;
// if (Utils::iequals(i->getValue<std::string>(), "idw"))
// m_outputTypes |= OUTPUT_TYPE_IDW;
// if (Utils::iequals(i->getValue<std::string>(), "den"))
// m_outputTypes |= OUTPUT_TYPE_DEN;
// if (Utils::iequals(i->getValue<std::string>(), "all"))
// m_outputTypes = OUTPUT_TYPE_ALL;
// }
//}
std::string primitive_type =
getOptions().getValueOrDefault<std::string>("primitive_type", "slope_d8");
if (Utils::iequals(primitive_type, "slope_d8"))
m_primitive_type = SLOPE_D8;
else if (Utils::iequals(primitive_type, "slope_fd"))
m_primitive_type = SLOPE_FD;
else if (Utils::iequals(primitive_type, "aspect_d8"))
m_primitive_type = ASPECT_D8;
else if (Utils::iequals(primitive_type, "aspect_fd"))
m_primitive_type = ASPECT_FD;
else if (Utils::iequals(primitive_type, "hillshade"))
m_primitive_type = HILLSHADE;
else if (Utils::iequals(primitive_type, "contour_curvature"))
m_primitive_type = CONTOUR_CURVATURE;
else if (Utils::iequals(primitive_type, "profile_curvature"))
m_primitive_type = PROFILE_CURVATURE;
else if (Utils::iequals(primitive_type, "tangential_curvature"))
m_primitive_type = TANGENTIAL_CURVATURE;
else if (Utils::iequals(primitive_type, "total_curvature"))
m_primitive_type = TOTAL_CURVATURE;
else if (Utils::iequals(primitive_type, "catchment_area"))
m_primitive_type = CATCHMENT_AREA;
else
{
std::ostringstream oss;
oss << "Unrecognized primitive type " << primitive_type;
throw pdal_error(oss.str().c_str());
}
setBounds(BOX2D());
}
Options DerivativeWriter::getDefaultOptions()
{
Options options;
options.add("grid_dist_x", 15.0, "X grid distance");
options.add("grid_dist_y", 15.0, "Y grid distance");
options.add("primitive_type", "slope_d8", "Primitive type");
return options;
}
double DerivativeWriter::GetNeighbor(Eigen::MatrixXd* data, int row, int col, Direction d)
{
double val;
switch (d)
{
case NORTH:
val = ((*data)(row-1, col));
break;
case SOUTH:
val = ((*data)(row+1, col));
break;
case EAST:
val = ((*data)(row, col+1));
break;
case WEST:
val = ((*data)(row, col-1));
break;
case NORTHEAST:
val = ((*data)(row-1, col+1));
break;
case NORTHWEST:
val = ((*data)(row-1, col-1));
break;
case SOUTHEAST:
val = ((*data)(row+1, col+1));
break;
case SOUTHWEST:
val = ((*data)(row+1, col-1));
break;
default:
val = ((*data)(row, col));
break;
}
return val;
}
double DerivativeWriter::determineSlopeFD(Eigen::MatrixXd* data, int row,
int col, double postSpacing, double valueToIgnore)
{
double tSlopeVal = valueToIgnore;
double tSlopeValDegree = valueToIgnore;
double mean = 0.0;
unsigned int nvals = 0;
double val = static_cast<double>((*data)(row, col));
double north = GetNeighbor(data, row, col, NORTH);
double south = GetNeighbor(data, row, col, SOUTH);
double east = GetNeighbor(data, row, col, EAST);
double west = GetNeighbor(data, row, col, WEST);
auto accumulate = [&nvals, &mean, valueToIgnore](double val)
{
if (val != valueToIgnore)
{
mean += val;
nvals++;
}
};
accumulate(val);
accumulate(north);
accumulate(south);
accumulate(east);
accumulate(west);
mean /= nvals;
if (north == valueToIgnore) north = mean;
if (south == valueToIgnore) south = mean;
if (east == valueToIgnore) east = mean;
if (west == valueToIgnore) west = mean;
double zX = (east - west) / (2 * postSpacing);
double zY = (north - south) / (2 * postSpacing);
double p = (zX * zX) + (zY * zY);
tSlopeVal = std::sqrt(p);
if (tSlopeVal != valueToIgnore)
tSlopeValDegree = atan(tSlopeVal) * (180.0f / c_pi);
return tSlopeValDegree;
}
double DerivativeWriter::determineSlopeD8(Eigen::MatrixXd* data, int row,
int col, double postSpacing, double valueToIgnore)
{
double tPhi1 = 1.0f;
double tPhi2 = sqrt(2.0f);
double tSlopeVal = valueToIgnore;
double tSlopeValDegree = valueToIgnore;
double val = static_cast<double>((*data)(row, col));
if (val == valueToIgnore)
return val;
double north = GetNeighbor(data, row, col, NORTH);
double south = GetNeighbor(data, row, col, SOUTH);
double east = GetNeighbor(data, row, col, EAST);
double west = GetNeighbor(data, row, col, WEST);
double northeast = GetNeighbor(data, row, col, NORTHEAST);
double northwest = GetNeighbor(data, row, col, NORTHWEST);
double southeast = GetNeighbor(data, row, col, SOUTHEAST);
double southwest = GetNeighbor(data, row, col, SOUTHWEST);
auto checkVal =
[val, &tSlopeVal, valueToIgnore, postSpacing](double neighbor, double phi)
{
if (neighbor != valueToIgnore)
{
neighbor = (val - neighbor) / (postSpacing * phi);
if (std::fabs(neighbor) > std::fabs(tSlopeVal) || tSlopeVal == valueToIgnore)
tSlopeVal = neighbor;
}
};
checkVal(north, tPhi1);
checkVal(south, tPhi1);
checkVal(east, tPhi1);
checkVal(west, tPhi1);
checkVal(northeast, tPhi2);
checkVal(northwest, tPhi2);
checkVal(southeast, tPhi2);
checkVal(southwest, tPhi2);
if (tSlopeVal != valueToIgnore)
tSlopeValDegree = atan(tSlopeVal) * (180.0f / c_pi);
return tSlopeValDegree;
}
double DerivativeWriter::determineAspectFD(Eigen::MatrixXd* data, int row,
int col, double postSpacing, double valueToIgnore)
{
double mean = 0.0;
unsigned int nvals = 0;
double val = static_cast<double>((*data)(row, col));
double north = GetNeighbor(data, row, col, NORTH);
double south = GetNeighbor(data, row, col, SOUTH);
double east = GetNeighbor(data, row, col, EAST);
double west = GetNeighbor(data, row, col, WEST);
auto accumulate = [&nvals, &mean, valueToIgnore](double val)
{
if (val != valueToIgnore)
{
mean += val;
nvals++;
}
};
accumulate(val);
accumulate(north);
accumulate(south);
accumulate(east);
accumulate(west);
mean /= nvals;
if (north == valueToIgnore) north = mean;
if (south == valueToIgnore) south = mean;
if (east == valueToIgnore) east = mean;
if (west == valueToIgnore) west = mean;
double zX = (east - west) / (2 * postSpacing);
double zY = (north - south) / (2 * postSpacing);
double p = (zX * zX) + (zY * zY);
return 180.0 - std::atan(zY/zX) + 90.0 * (zX / std::fabs(zX));
}
double DerivativeWriter::determineAspectD8(Eigen::MatrixXd* data, int row,
int col, double postSpacing)
{
double tPhi1 = 1.0f;
double tPhi2 = sqrt(2.0f);
double tH = postSpacing;
double tVal, tN, tS, tE, tW, tNW, tNE, tSW, tSE, nextTVal;
double tSlopeVal = std::numeric_limits<double>::max(), tSlopeValDegree;
int tNextY, tNextX;
unsigned int j = 0;
tVal = (*data)(row, col);
if (tVal == std::numeric_limits<double>::max())
return tVal;
//North
nextTVal = GetNeighbor(data, row, col, NORTH);
if (nextTVal < std::numeric_limits<double>::max())
{
tN = (tVal - nextTVal) / (tH * tPhi1);
if (tN > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
{
tSlopeVal = tN;
j = 8;
}
}
//South
nextTVal = GetNeighbor(data, row, col, SOUTH);
if (nextTVal < std::numeric_limits<double>::max())
{
tS = (tVal - nextTVal) / (tH * tPhi1);
if (tS > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
{
tSlopeVal = tS;
j = 4;
}
}
//East
nextTVal = GetNeighbor(data, row, col, EAST);
if (nextTVal < std::numeric_limits<double>::max())
{
tE = (tVal - nextTVal) / (tH * tPhi1);
if (tE > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
{
tSlopeVal = tE;
j = 2;
}
}
//West
nextTVal = GetNeighbor(data, row, col, WEST);
if (nextTVal < std::numeric_limits<double>::max())
{
tW = (tVal - nextTVal) / (tH * tPhi1);
if (tW > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
{
tSlopeVal = tW;
j = 6;
}
}
//NorthEast
nextTVal = GetNeighbor(data, row, col, NORTHEAST);
if (nextTVal < std::numeric_limits<double>::max())
{
tNE = (tVal - nextTVal) / (tH * tPhi2);
if (tNE > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
{
tSlopeVal = tNE;
j = 1;
}
}
//NorthWest
nextTVal = GetNeighbor(data, row, col, NORTHWEST);
if (nextTVal < std::numeric_limits<double>::max())
{
tNW = (tVal - nextTVal) / (tH * tPhi2);
if (tNW > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
{
tSlopeVal = tNW;
j = 7;
}
}
//SouthEast
nextTVal = GetNeighbor(data, row, col, SOUTHEAST);
if (nextTVal < std::numeric_limits<double>::max())
{
tSE = (tVal - nextTVal) / (tH * tPhi2);
if (tSE > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
{
tSlopeVal = tSE;
j = 3;
}
}
//SouthWest
nextTVal = GetNeighbor(data, row, col, SOUTHWEST);
if (nextTVal < std::numeric_limits<double>::max())
{
tSW = (tVal - nextTVal) / (tH * tPhi2);
if (tSW > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
{
tSlopeVal = tSW;
j = 5;
}
}
//tSlopeValDegree = 45 * j;
tSlopeValDegree = std::pow(2.0,j-1);
return tSlopeValDegree;
}
int DerivativeWriter::determineCatchmentAreaD8(Eigen::MatrixXd* data,
Eigen::MatrixXd* area, int row, int col, double postSpacing)
{
if ((*area)(row, col) > 0)
{
return (*area)(row, col);
}
else
{
(*area)(row, col) = 1;
for (int i = 1; i < 9; ++i)
{
int j, k;
switch (i)
{
case 1:
j = row - 1;
k = col + 1;
break;
case 2:
j = row;
k = col + 1;
break;
case 3:
j = row + 1;
k = col + 1;
break;
case 4:
j = row + 1;
k = col;
break;
case 5:
j = row + 1;
k = col - 1;
break;
case 6:
j = row;
k = col - 1;
break;
case 7:
j = row - 1;
k = col - 1;
break;
case 8:
j = row - 1;
k = col;
break;
}
if ((*area)(j, k) > 0)
(*area)(row, col) += determineCatchmentAreaD8(data, area, j, k,
postSpacing);
// not quite complete here...
}
//double tPhi1 = 1.0f;
//double tPhi2 = sqrt(2.0f);
//double tH = postSpacing;
//double tVal, tN, tS, tE, tW, tNW, tNE, tSW, tSE, nextTVal;
//double tSlopeVal = std::numeric_limits<double>::max(), tSlopeValDegree;
//int tNextY, tNextX;
//unsigned int j = 0;
//tVal = (*data)(row, col);
//if (tVal == std::numeric_limits<double>::max())
// return tVal;
////North
//tNextY = row - 1;
//tNextX = col;
//nextTVal = (*data)(tNextY, tNextX);
//if (nextTVal < std::numeric_limits<double>::max())
//{
// tN = (tVal - nextTVal) / (tH * tPhi1);
// if (tN > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
// {
// tSlopeVal = tN;
// j = 8;
// }
//}
////South
//tNextY = row + 1;
//tNextX = col;
//nextTVal = (*data)(tNextY, tNextX);
//if (nextTVal < std::numeric_limits<double>::max())
//{
// tS = (tVal - nextTVal) / (tH * tPhi1);
// if (tS > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
// {
// tSlopeVal = tS;
// j = 4;
// }
//}
////East
//tNextY = row;
//tNextX = col + 1;
//nextTVal = (*data)(tNextY, tNextX);
//if (nextTVal < std::numeric_limits<double>::max())
//{
// tE = (tVal - nextTVal) / (tH * tPhi1);
// if (tE > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
// {
// tSlopeVal = tE;
// j = 2;
// }
//}
////West
//tNextY = row;
//tNextX = col - 1;
//nextTVal = (*data)(tNextY, tNextX);
//if (nextTVal < std::numeric_limits<double>::max())
//{
// tW = (tVal - nextTVal) / (tH * tPhi1);
// if (tW > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
// {
// tSlopeVal = tW;
// j = 6;
// }
//}
////NorthEast
//tNextY = row - 1;
//tNextX = col + 1;
//nextTVal = (*data)(tNextY, tNextX);
//if (nextTVal < std::numeric_limits<double>::max())
//{
// tNE = (tVal - nextTVal) / (tH * tPhi2);
// if (tNE > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
// {
// tSlopeVal = tNE;
// j = 1;
// }
//}
////NorthWest
//tNextY = row - 1;
//tNextX = col - 1;
//nextTVal = (*data)(tNextY, tNextX);
//if (nextTVal < std::numeric_limits<double>::max())
//{
// tNW = (tVal - nextTVal) / (tH * tPhi2);
// if (tNW > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
// {
// tSlopeVal = tNW;
// j = 7;
// }
//}
////SouthEast
//tNextY = row + 1;
//tNextX = col + 1;
//nextTVal = (*data)(tNextY, tNextX);
//if (nextTVal < std::numeric_limits<double>::max())
//{
// tSE = (tVal - nextTVal) / (tH * tPhi2);
// if (tSE > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
// {
// tSlopeVal = tSE;
// j = 3;
// }
//}
////SouthWest
//tNextY = row + 1;
//tNextX = col - 1;
//nextTVal = (*data)(tNextY, tNextX);
//if (nextTVal < std::numeric_limits<double>::max())
//{
// tSW = (tVal - nextTVal) / (tH * tPhi2);
// if (tSW > tSlopeVal || tSlopeVal == std::numeric_limits<double>::max())
// {
// tSlopeVal = tSW;
// j = 5;
// }
//}
//switch (j)
//{
//case 1:
// tNextY = row - 1;
// tNextX = col + 1;
// break;
//case 2:
// tNextY = row;
// tNextX = col + 1;
// break;
//case 3:
// tNextY = row + 1;
// tNextX = col + 1;
// break;
//case 4:
// tNextY = row + 1;
// tNextX = col;
// break;
//case 5:
// tNextY = row + 1;
// tNextX = col - 1;
// break;
//case 6:
// tNextY = row;
// tNextX = col - 1;
// break;
//case 7:
// tNextY = row - 1;
// tNextX = col - 1;
// break;
//case 8:
// tNextY = row - 1;
// tNextX = col;
// break;
//}
//(*area)(row, col) = determineCatchmentAreaD8(data, area, tNextY, tNextX, postSpacing);
}
return 0;
}
double DerivativeWriter::determineHillshade(Eigen::MatrixXd* data, int row,
int col, double zenithRad, double azimuthRad, double postSpacing)
{
//ABELL - tEVar not currently used.
//double tAVar, tBVar, tCVar, tDVar, tEVar, tFVar, tGVar, tHVar, tIVar;
double tAVar, tBVar, tCVar, tDVar, tFVar, tGVar, tHVar, tIVar;
double tDZDX, tDZDY, tSlopeRad, tAspectRad = 0.0;
double tHillShade;
tAVar = GetNeighbor(data, row, col, NORTHWEST);
tBVar = GetNeighbor(data, row, col, NORTH);
tCVar = GetNeighbor(data, row, col, NORTHWEST);
tDVar = GetNeighbor(data, row, col, WEST);
//tEVar = (double)(*data)(row, col);
tFVar = GetNeighbor(data, row, col, EAST);
tGVar = GetNeighbor(data, row, col, SOUTHWEST);
tHVar = GetNeighbor(data, row, col, SOUTH);
tIVar = GetNeighbor(data, row, col, SOUTHEAST);
tDZDX = ((tCVar + 2 * tFVar + tIVar) - (tAVar + 2 * tDVar + tGVar)) /
(8 * postSpacing);
tDZDY = ((tGVar + 2* tHVar + tIVar) - (tAVar + 2 * tBVar + tCVar)) /
(8 * postSpacing);
tSlopeRad = atan(sqrt(pow(tDZDX, 2) + pow(tDZDY, 2)));
if (tDZDX == 0)
{
if (tDZDY > 0)
{
tAspectRad = c_pi / 2;
}
else if (tDZDY < 0)
{
tAspectRad = (2 * c_pi) - (c_pi / 2);
}
else
{
//ABELL - This looks wrong. At least needs a comment.
// tAspectRad = tAspectRad;
;
}
}
else
{
tAspectRad = atan2(tDZDY, -1 * tDZDX);
if (tAspectRad < 0)
{
tAspectRad = 2 * c_pi + tAspectRad;
}
}
tHillShade = (((cos(zenithRad) * cos(tSlopeRad)) + (sin(zenithRad) *
sin(tSlopeRad) * cos(azimuthRad - tAspectRad))));
return tHillShade;
}
double DerivativeWriter::determineContourCurvature(Eigen::MatrixXd* data,
int row, int col, double postSpacing, double valueToIgnore)
{
double mean = 0.0;
unsigned int nvals = 0;
double value = static_cast<double>((*data)(row, col));
double north = GetNeighbor(data, row, col, NORTH);
double south = GetNeighbor(data, row, col, SOUTH);
double east = GetNeighbor(data, row, col, EAST);
double west = GetNeighbor(data, row, col, WEST);
double northeast = GetNeighbor(data, row, col, NORTHEAST);
double northwest = GetNeighbor(data, row, col, NORTHWEST);
double southeast = GetNeighbor(data, row, col, SOUTHEAST);
double southwest = GetNeighbor(data, row, col, SOUTHWEST);
auto accumulate = [&nvals, &mean, valueToIgnore](double val)
{
if (val != valueToIgnore)
{
mean += val;
nvals++;
}
};
accumulate(value);
accumulate(north);
accumulate(south);
accumulate(east);
accumulate(west);
accumulate(northeast);
accumulate(northwest);
accumulate(southeast);
accumulate(southwest);
mean /= nvals;
if (value == valueToIgnore) value = mean;
if (north == valueToIgnore) north = mean;
if (south == valueToIgnore) south = mean;
if (east == valueToIgnore) east = mean;
if (west == valueToIgnore) west = mean;
if (northeast == valueToIgnore) northeast = mean;
if (northwest == valueToIgnore) northwest = mean;
if (southeast == valueToIgnore) southeast = mean;
if (southwest == valueToIgnore) southwest = mean;
double zXX = (east - 2.0 * value + west) / (postSpacing * postSpacing);
double zYY = (north - 2.0 * value + south) / (postSpacing * postSpacing);
double zXY = ((-1.0 * northwest) + northeast + southwest - southeast) / (4.0 * postSpacing * postSpacing);
double zX = (east - west) / (2 * postSpacing);
double zY = (north - south) / (2 * postSpacing);
double p = (zX * zX) + (zY * zY);
double q = p + 1;
return static_cast<float>(((zXX*zX*zX)-(2*zXY*zX*zY)+(zYY*zY*zY))/(p*std::sqrt(q*q*q)));
}
double DerivativeWriter::determineProfileCurvature(Eigen::MatrixXd* data,
int row, int col, double postSpacing, double valueToIgnore)
{
double mean = 0.0;
unsigned int nvals = 0;
double value = static_cast<double>((*data)(row, col));
double north = GetNeighbor(data, row, col, NORTH);
double south = GetNeighbor(data, row, col, SOUTH);
double east = GetNeighbor(data, row, col, EAST);
double west = GetNeighbor(data, row, col, WEST);
double northeast = GetNeighbor(data, row, col, NORTHEAST);
double northwest = GetNeighbor(data, row, col, NORTHWEST);
double southeast = GetNeighbor(data, row, col, SOUTHEAST);
double southwest = GetNeighbor(data, row, col, SOUTHWEST);
auto accumulate = [&nvals, &mean, valueToIgnore](double val)
{
if (val != valueToIgnore)
{
mean += val;
nvals++;
}
};
accumulate(value);
accumulate(north);
accumulate(south);
accumulate(east);
accumulate(west);
accumulate(northeast);
accumulate(northwest);
accumulate(southeast);
accumulate(southwest);
mean /= nvals;
if (value == valueToIgnore) value = mean;
if (north == valueToIgnore) north = mean;
if (south == valueToIgnore) south = mean;
if (east == valueToIgnore) east = mean;
if (west == valueToIgnore) west = mean;
if (northeast == valueToIgnore) northeast = mean;
if (northwest == valueToIgnore) northwest = mean;
if (southeast == valueToIgnore) southeast = mean;
if (southwest == valueToIgnore) southwest = mean;
double zXX = (east - 2.0 * value + west) / (postSpacing * postSpacing);
double zYY = (north - 2.0 * value + south) / (postSpacing * postSpacing);
double zXY = ((-1.0 * northwest) + northeast + southwest - southeast) / (4.0 * postSpacing * postSpacing);
double zX = (east - west) / (2 * postSpacing);
double zY = (north - south) / (2 * postSpacing);
double p = (zX * zX) + (zY * zY);
double q = p + 1;
return static_cast<float>(((zXX*zX*zX)+(2*zXY*zX*zY)+(zYY*zY*zY))/(p*std::sqrt(q*q*q)));
}
double DerivativeWriter::determineTangentialCurvature(Eigen::MatrixXd* data,
int row, int col, double postSpacing, double valueToIgnore)
{
double mean = 0.0;
unsigned int nvals = 0;
double value = static_cast<double>((*data)(row, col));
double north = GetNeighbor(data, row, col, NORTH);
double south = GetNeighbor(data, row, col, SOUTH);
double east = GetNeighbor(data, row, col, EAST);
double west = GetNeighbor(data, row, col, WEST);
double northeast = GetNeighbor(data, row, col, NORTHEAST);
double northwest = GetNeighbor(data, row, col, NORTHWEST);
double southeast = GetNeighbor(data, row, col, SOUTHEAST);
double southwest = GetNeighbor(data, row, col, SOUTHWEST);
auto accumulate = [&nvals, &mean, valueToIgnore](double val)
{
if (val != valueToIgnore)
{
mean += val;
nvals++;
}
};
accumulate(value);
accumulate(north);
accumulate(south);
accumulate(east);
accumulate(west);
accumulate(northeast);
accumulate(northwest);
accumulate(southeast);
accumulate(southwest);
mean /= nvals;
if (value == valueToIgnore) value = mean;
if (north == valueToIgnore) north = mean;
if (south == valueToIgnore) south = mean;
if (east == valueToIgnore) east = mean;
if (west == valueToIgnore) west = mean;
if (northeast == valueToIgnore) northeast = mean;
if (northwest == valueToIgnore) northwest = mean;
if (southeast == valueToIgnore) southeast = mean;
if (southwest == valueToIgnore) southwest = mean;
double zXX = (east - 2.0 * value + west) / (postSpacing * postSpacing);
double zYY = (north - 2.0 * value + south) / (postSpacing * postSpacing);
double zXY = ((-1.0 * northwest) + northeast + southwest - southeast) / (4.0 * postSpacing * postSpacing);
double zX = (east - west) / (2 * postSpacing);
double zY = (north - south) / (2 * postSpacing);
double p = (zX * zX) + (zY * zY);
double q = p + 1;
return static_cast<float>(((zXX*zY*zY)-(2*zXY*zX*zY)+(zYY*zX*zX))/(p*std::sqrt(q)));
}
double DerivativeWriter::determineTotalCurvature(Eigen::MatrixXd* data, int row,
int col, double postSpacing, double valueToIgnore)
{
double mean = 0.0;
unsigned int nvals = 0;
double value = static_cast<double>((*data)(row, col));
double north = GetNeighbor(data, row, col, NORTH);
double south = GetNeighbor(data, row, col, SOUTH);
double east = GetNeighbor(data, row, col, EAST);
double west = GetNeighbor(data, row, col, WEST);
double northeast = GetNeighbor(data, row, col, NORTHEAST);
double northwest = GetNeighbor(data, row, col, NORTHWEST);
double southeast = GetNeighbor(data, row, col, SOUTHEAST);
double southwest = GetNeighbor(data, row, col, SOUTHWEST);
auto accumulate = [&nvals, &mean, valueToIgnore](double val)
{
if (val != valueToIgnore)
{
mean += val;
nvals++;
}
};
accumulate(value);
accumulate(north);
accumulate(south);
accumulate(east);
accumulate(west);
accumulate(northeast);
accumulate(northwest);
accumulate(southeast);
accumulate(southwest);
mean /= nvals;
if (value == valueToIgnore) value = mean;
if (north == valueToIgnore) north = mean;
if (south == valueToIgnore) south = mean;
if (east == valueToIgnore) east = mean;
if (west == valueToIgnore) west = mean;
if (northeast == valueToIgnore) northeast = mean;
if (northwest == valueToIgnore) northwest = mean;
if (southeast == valueToIgnore) southeast = mean;
if (southwest == valueToIgnore) southwest = mean;
double zXX = (east - 2.0 * value + west) / (postSpacing * postSpacing);
double zYY = (north - 2.0 * value + south) / (postSpacing * postSpacing);
double zXY = ((-1.0 * northwest) + northeast + southwest - southeast) / (4.0 * postSpacing * postSpacing);
return static_cast<float>((zXX * zXX) + (2.0 * zXY * zXY) + (zYY * zYY));
}
GDALDataset* DerivativeWriter::createFloat32GTIFF(std::string filename,
int cols, int rows)
{
char **papszMetadata;
// parse the format driver, hardcoded for the time being
std::string tFormat("GTIFF");
const char *pszFormat = tFormat.c_str();
GDALDriver* tpDriver = GetGDALDriverManager()->GetDriverByName(pszFormat);
// try to create a file of the requested format
if (tpDriver != NULL)
{
papszMetadata = tpDriver->GetMetadata();
if (CSLFetchBoolean(papszMetadata, GDAL_DCAP_CREATE, FALSE))
{
char **papszOptions = NULL;
boost::filesystem::path p(filename);
p.replace_extension(".tif");
GDALDataset *dataset;
dataset = tpDriver->Create(p.string().c_str(), cols, rows, 1,
GDT_Float32, papszOptions);
BOX2D& extent = getBounds();
// set the geo transformation
double adfGeoTransform[6];
adfGeoTransform[0] = extent.minx; // - 0.5*m_GRID_DIST_X;
adfGeoTransform[1] = m_GRID_DIST_X;
adfGeoTransform[2] = 0.0;
adfGeoTransform[3] = extent.maxy; // + 0.5*m_GRID_DIST_Y;
adfGeoTransform[4] = 0.0;
adfGeoTransform[5] = -1 * m_GRID_DIST_Y;
dataset->SetGeoTransform(adfGeoTransform);
// set the projection
log()->get(LogLevel::Debug5) << m_inSRS.getWKT() << std::endl;
dataset->SetProjection(m_inSRS.getWKT().c_str());
if (dataset)
return dataset;
}
}
return NULL;
}