It's under active development, that's why it's black. I use that as a test server, and I may make it private to prevent that sort of confusion. I think you mean negative Y coordinate, and there's a good reason: In Minecraft, negative Z is north and positive Z is south. I'm working on a demo in the northern hemisphere, where positive UTM coordinates are north, so I just negate the coordinates to prevent the area from occurring upside down.

The server is now something of a test area for a private project, so I should probably separate it out and make it not publicly-accessible for this portion of the project (while keeping the old SparseWorld Dynmap visible for curious visitors).

Hello again,
Sorry I have not emailed you yet, things have been quite crazy for me, applying to colleges and getting my decisions.
I definitely want to talk to you, maybe in a few days later this week would work?
Also, currently, as a side project, I'm working on generating a monotone model of Boston/Chicago or maybe part of New York (a group in Brooklyn might do a project similar to mine) from LIDAR models.
I thought you might find that interesting.
Thanks

Sure, keep me posted.
Cool, can you tell me more about that extension of the project, as well as the group considering something similar?

Definitely. I also just finally got an actual license for the software I used for LIDAR/.LAS conversion, so I'll be able to do a lot more of that from now on.

That's great to hear! Are you using one of the LASTools components, or did someone roll their own software based on LASLib? Have you found sufficient sources for your LiDAR data from the USGS and others?