Method at

grid_map_core/src/GridMap.cpp:221–227

}

float GridMap::at(const std::string& layer, const Index& index) const {
  try {
    return data_.at(layer)(index(0), index(1));
  } catch (const std::out_of_range& exception) {
    throw std::out_of_range("GridMap::at(...) : No map layer '" + layer + "' available.");
  }
}

bool GridMap::getIndex(const Position& position, Index& index) const {
  return getIndexFromPosition(index, position, length_, position_, resolution_, size_, startIndex_);