Elite: Dangerous Database
Third party tools & mods for Elite: Dangerous
Elite Dangerous Exploration Guide
Galaxy map tip
If I am understanding you correctly, are there maps from other thargoid map rooms with a different binary encoding that can be used to narrow the search.
Here's a quick guide to using Elite's in-game maps to get from A to B, and picking an interesting target to head to in the first place! When the marker is towards the right, it is set to maximum.