after having enjoyed some of the wonderful mods that i found here (Bob's, Dytech's, Treefarm, RSO, FARL, ResourceMonitor to only name a few), i've tried to make one too, starting from my experience in my recent game with RSO and Bob.
I found that ores were too abundant and too close (no need to expand very much), BUT when i was looking for Rutile, I didn't find it fun running around for maybe 30 min or 1 h withough finding anything.
So ... I made a mod that allows one to build Geology Lab, able to produce "ore maps" for a given ore. Gameplay wise, this is achieved using a ResourceMonitor inspired GUI that displays direction and distance of surveyed deposits.
The mod currently works, eg, allows to track deposits (survey happens in a square area of a maximum size = 20 000, this is configurable in config.lua), but all resource costs are still placeholders, as are graphics (taken from recycling mod).
The source code is on github, release is available here
The mod currently supports iron/copper and BoB's ores, but it's pretty easy to add new ones.
I'd be interested by any feedback
0.2 : now triggers generation of chunks as needed. can take a while if resources are scarce (several minutes), (but it works in the background, it doesn't freeze the game). Supports multiple simultaneous prospections but due to performance requirements, resources are prioritized towards the older prospections
0.1.1 : support for Dytech. also added missing Gems/Oil/Stone/Coal. Tech now costs 100 red/100 green
0.1.0 : initial release, support for Bob's ores
edit : added a screenshot of the GUI