Ligeia Mare
What Ligeia Mare is
Ligeia Mare is a mare — a large dark plain — an ancient lava flood, not a sea — on Titan, 500 km across, centred at 79.7° N, 112.1° E. It is the 30th largest named feature on Titan and the 2nd largest of its class there.
Where the name comes from
One of the sirens in Greek mythology. The International Astronomical Union approved the name in 2008, under the theme it applies to every mare on Titan. Of the 3 features of this class catalogued on Titan, the naming categories run Norway (1), Greek (1), New Zealand (1).
What it would take to settle Ligeia Mare
Titan scores 32.6 as a world. That number is the same for every square metre of it — but sunlight, water, radiation and the ground under your feet are not. This is the same question asked at 79.7° N, 112.1° E.
What this spot has going for it is ground — flat ground — the easiest thing to land on and build across. What works against it is temperature — about -180 °C mean at this latitude.
Computed from Ligeia Mare's catalogued latitude, longitude and feature class — 74% of the model's weight had a basis here, and 2 axes were dropped as not applicable to Titan (radiation geometry, earth link). Gravity, pressure, delta-v and distance from the Sun are the same everywhere on Titan and are already counted in the world's own index, not again here.
What this cannot see: elevation. Slope, local shadowing and the polar “peaks of eternal light” — ridge tops near the poles of a barely tilted world that catch sun almost continuously while a crater floor kilometres away never does — need a terrain model this does not have. Where a real mission targets a pole, that is usually why.