Sorry if this is in the wrong category but I'm looking at a world that is 7gb and about 4-5 years old and I recently got hold of it again and I really want to find my old builds on it but since it is so huge I can't find it amongst other players builds, is there some kind of tool (if even possible) I can use to find blocks I have placed, it has hundreds of thousands of players registered within playerdata but I highly doubt that registers blocks placed, I do have the world folders like DIM1 DIM-1, region and data if any of those 4 happen to hold info like the exact locations of blocks placed by certain players, which would really help.
This world is about 6600x6600 blocks; you can either pan around and zoom in/out while using Minutor, which also shows the coordinates your mouse cursor is over, or save an image of the entire world to view it all at once to get a general view (note that this world is only about 0.5 GB so a 7 GB world may be too much, especially if players had gone very far out - the resulting image could be too large for any image viewers to open):
The same world but in night mode, with structures standing out much better, even all the surface cave openings I've lit up:
You can also view slices of the underground to find things (again, night mode makes it much easier to find things a sit will show areas that were lit up):
I don't know how well they support the latest versions though (Unmined has two versions, one for 1.13+ and one for older versions, which are not cross-compatible; I'm also not sure what the newer version does if you open a 1.13+ that wasn't fully converted/"optimized" and still has pre-1.13 chunks as a result)