yep, I talking about that format, what you describe.
I have some requests about converting geo from L2j to L2d and this geo-format still required for users. I only wanna make a tool, which gives you ability to convert any geo in any required format for you.
From:
_conv.dat, l2j, l2d, l2g, l2m, rp, l2s (required info about binded server ip), _path.txt (Pandas Style)
To:
_conv.dat, l2j, l2g and wanna add in l2d in future.
Now I working about improvments for parsing geo-data from _path.txt format, because existed Pandas converter do it poorly (maybe it will be private... I will write if it will be successfull)