Limit number of bays in the tile to the largest 10.

[zerebubuth]

This adds a tile_kind_rank on bays, straits and fjords based on the area of the feature. Labels are only kept if they're in the top 10 for the metatile. For the area around Vancouver, this looks like it keeps enough labels, but they're not so overwhelming any more.

Connects to #1838.

Before

Zoom 8

Zoom 9

After

Zoom 8

Zoom 9

[nvkelso]

LGTM

¿is the kind_tile_rank shared between those 3 kinds or separate ranks for each kind?`

[zerebubuth]

¿is the kind_tile_rank shared between those 3 kinds or separate ranks for each kind?

Shared between those 3, since it seemed like the context was "smaller coastal features". We use the same min_zoom calculation for all 3, so it seemed fair to compare them.

Easy to change, if you'd prefer it separate for all 3? I'm not sure how many tiles have significant numbers of more than one of these, so would the limit be 10 each, or 3-4 of each?

[nvkelso]

I think it's fine to share them, the grouping is logically consistent.

Can you add docs that these kinds also have the new kind_tile_rank, please?