reduce the dimensions of the storage map

[Siming-He]

Hello,

I read the issue #162 and thought I can contribute to the reduction of storage map dimension. I mainly made changes in _voxelmapper and _local_globalmapper files. As a result, the storage map is three times larger than the local map and the history voxel information is remained after re-initialization. I wish to get some feedback on what I did and see what else I can do to contribute to it. Also, since I'm a Penn student, I'd love to talk in person if it would be convenient for you. Below are images showing how the storage map is reduced.

[XuRobotics]

Hi Siming, Thanks for your contribution! Sorry for the late response. I will take a look and get back to you soon!

If you are interested to chat regarding research related to aerial autonomy, feel free to email me at my Penn seas email starting with liuxu.