Latitude of the centre of boundingBox.
Longitude of the centre of boundingBox.
The place's representative cell (Section C.3).
Roughly how large the place is, everything under it included, in
square degrees -- from its area byte (Section C.3), so within about
9% either way. Useful for zooming a map to it: a square of this area
is sqrt(area) degrees on a side, which a Web Mercator map shows
across one 256-pixel tile at zoom log2(360 / sqrt(area)).
locate()'s result: a point inside a place, and the cell it's the centre of.