Add landuse=winter_sports to landuse

[nvkelso]

Pairing with: #342 to add ski routes to roads layer, we should mark the extend of the winter_sports areas by adding them to the landuse layer.

[zerebubuth]

After #430, it looks like this (without most of the labels - I really wasn't able to figure out why they aren't rendering):

Lake Tahoe

Before:

After:

[zerebubuth]

It's worth noting that there are really very few of these (about 45 in North America), so perhaps something we can target with a Targeted Editing post? Pistes without an enclosing winter sports area?

[nvkelso]

@zerebubuth the new pistes features are in the roads layer, and we already calculate the landuse_kind for that layer, so it should be easy to make a Targeted Editing post highlighting the ones missing the landuse AOI, /cc @IndyHurt. The one thing to watch is making sure the landuse sort is sane (not 0 or 1, and probably above forest/wood) otherwise we won't consistently get that?

[nvkelso]

We're missing a sort key in the _landuse_sort_order definition in TileStache's tranform step. Let's set this on the server to 4 (so it's above forest and wood).

[zerebubuth]

I'm not sure that order=4 is the right way to go. Many winter sports areas have forests within the grounds which quite nicely show the larger pistes. For example, with order=4, the whole ski area looks blank:

Whereas, with order=2, a whole lot more detail is visible:

Unfortunately, the ski area itself almost disappears. Perhaps we need an overlap-style processing layer to add landuse_parent_kind so that we can display forests inside ski areas differently? Something to think about for #446.

[nvkelso]

Good point. In the stylesheet it defaults to 1 and I get mostly what you get for a value of 2. Let's go with 2 as that is in with park (2) and still below forest (3).

I'm filtering "wood" and "forest" in the stylesheet so I get more of the winter_sport landuse area showing up (since it's not obscured) at zooms less than 14. Mostly we need to add the sort this landuse can partake in the road layer intercut.

[nvkelso]

Verified sort key.

[nvkelso]

@sensescape Candidate for another new icon ski / winter_sport.