GeoRasterTableFunctions.cpp File Reference

#include "GeoRasterTableFunctions.hpp"

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Functions
RasterAggType	get_raster_agg_type (const std::string &agg_type_str, const bool is_fill_agg)
std::vector< double >	generate_1d_gaussian_kernel (const int64_t fill_radius, double sigma)

Function Documentation

std::vector<double> generate_1d_gaussian_kernel	(	const int64_t	fill_radius,
		double	sigma
	)

Definition at line 46 of file GeoRasterTableFunctions.cpp.

References M_PI.

Referenced by GeoRaster< T, Z >::fill_bins_from_gaussian_neighborhood().

                                                                                       {
  const int64_t kernel_size = fill_radius * 2 + 1;
  std::vector<double> gaussian_kernel(kernel_size);
  const double expr = 1.0 / (sigma * sqrt(2.0 * M_PI));
  for (int64_t kernel_idx = -fill_radius; kernel_idx <= fill_radius; ++kernel_idx) {
    gaussian_kernel[kernel_idx + fill_radius] =
        expr * exp((kernel_idx * kernel_idx) / (-2.0 * (sigma * sigma)));
  }
  return gaussian_kernel;
}

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RasterAggType get_raster_agg_type	(	const std::string &	agg_type_str,
		const bool	is_fill_agg
	)

Definition at line 21 of file GeoRasterTableFunctions.cpp.

References AVG, BOX_AVG, COUNT, GAUSS_AVG, INVALID, MAX, MIN, SUM, and to_upper().

Referenced by tf_geo_multi_rasterize__cpu_template(), tf_geo_rasterize__cpu_template(), tf_geo_rasterize_slope__cpu_template(), and GDALTableFunctions::tf_raster_contour_rasterize_impl().

                                                          {
  const auto upper_agg_type_str = to_upper(agg_type_str);
  const static std::map<std::string, RasterAggType> agg_type_map = {
      {"COUNT", RasterAggType::COUNT},
      {"MIN", RasterAggType::MIN},
      {"MAX", RasterAggType::MAX},
      {"SUM", RasterAggType::SUM},
      {"AVG", RasterAggType::AVG},
      {"GAUSS_AVG", RasterAggType::GAUSS_AVG},
      {"BOX_AVG", RasterAggType::BOX_AVG}};
  const auto itr = agg_type_map.find(upper_agg_type_str);
  if (itr == agg_type_map.end()) {
    return RasterAggType::INVALID;
  }
  if (is_fill_agg && itr->second == RasterAggType::AVG) {
    return RasterAggType::GAUSS_AVG;
  } else if (!is_fill_agg && (itr->second == RasterAggType::BOX_AVG ||
                              itr->second == RasterAggType::GAUSS_AVG)) {
    // GAUSS_AVG and BOX_AVG are fill-only aggregates
    return RasterAggType::INVALID;
  }
  return itr->second;
}

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