Here's a rough map of the mining world. Sorry about the lack of coordinates, but I'm lazy. The map is about 4000x4000, with /warp mining, the pink dot in the center, at 0,0 . I would guess that you can find the desert near 1800,0 and the mesa near -1000, -1800.
WellI got to -1000, -1800 and could not find the mesa. I traveled a lot farther in a south easterly direction and thought that would get me theorem but ran out of food. Desert was easy since you can travel over water, but the mesa could be a pain since it is mostly land. I may look at the coords on the map and compare it to my copy of amidst and get a better idea as to the coords and a path. Thanks!
This is helpful, thanks for doing another map Random0ne ! Mesa biome about 370 blocks north of mining4 - Coords: -203 +1731 Packed Ice - slightly south of mining7 +1336 -1289
Mega, I found the Packed Ice. Love me some packed ice. Thanks for the info on Mesa. I may put up a sign.