Assemble your information into a couple of Glass Gazettes
From Fallen London Wiki
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From: Review your Sightings
Enough individual sightings in time become a map.
Unlocked with 
25 x Sighting of a Parabolan Landmark
Success
Layering
You record your observations on a layer of onionskin. Then you rotate the sheet and copy them over, and over again, until you have formed a spiral of Parabolan places, [...] Every place in Parabola must have its reflections, its duplicates, its variants [...]
You've gained 2 x Glass Gazette
You've lost 25 x Sighting of a Parabolan Landmark
