resent local maps for scan-matching is prone to accumurate the errors;
once the submaps completed ,no more new scans inserted into the submaps; submap停止更新,why?
然后所有子地图和scans都视为loop closure
a submap container -> close submap ->scan matcher ->loop constraint
Processing
1.scans
子地图的构建就是submaps 和scan 坐标系aligning的迭代过程 还有transformT 保持两个坐标系统一
2.