镜像：https://github.com/gaoxiang12/slambook2

吉林大学nano团队共享仓库

github镜像，请勿修改，2022.3.3 https://github.com/cartographer-project/cartographer.git https://github.com/cartographer-project/cartographer_ros.git https://github.com/ceres-solver/ceres-solver.git

镜像：https://github.com/RainerKuemmerle/g2o

镜像：https://github.com/strasdat/Sophus.git

copy from https://github.com/ros-perception/slam_gmapping.git 2022.2.23 melodic