what should be noted when the code runs in real environment

[Zhengjun-Du]

Hi, Lintao, good work for auto navigation! I have run your code in real environment, I get a correct octomap, but I find the computed path is wrong, I noted that there are some parameters such as realWorld_to_field_scale, realWorld_to_field_offset_x, realWorld_to_field_offset_y, do I need to modify these parameters or other places?