Having a global 3D map (generated using slam stereo vision) of a given space, what approach would be appropriate to use this map to localize a vehicle - using stereo vision as an input?
For stereo-vision, ORB-SLAM2 or 3 can be interesting, source code is available in GitHub to quickly test and evaluate the algorithms. There is also Kimera-VIO (Stereo/Mono + IMU) which can be interesting.