virtual void PreloadMapArea(const Eigen::Vector3d &location, const Eigen::Vector3d &trans_diff, unsigned int resolution_id, unsigned int zone_id)
Preload map nodes for the next frame location calculation.
virtual bool LoadMapArea(const Eigen::Vector3d &seed_pt3d, unsigned int resolution_id, unsigned int zone_id, int filter_size_x, int filter_size_y)
Load map nodes for the location calculate of this frame.