CODEWITHSUNDEEP
mapbox-glmapbox-gl-js
CCantey
CCantey

Reputation: 306

Label orientation in Mapbox Studio or Mapbox GL JS

Is it possible to make a label orientation a function of the shape of the polygon it is labeling? Ideally this sort of label placement optimization would come out of the box from Mapbox Studio.

I imagine it's possible with Mapbox GL JS with https://www.mapbox.com/mapbox-gl-style-spec/#layout-symbol-text-rotate, but that seems like it might be a non-trivial JavaScript task in the Land of 10,000 Lakes(?). The end result will be a Mapbox GL served vector basemap.

Medicine Lake default orientation:

enter image description here

Medicine Lake ideal orientation (but I don't necessarily want any other lake label rotated):

enter image description here

Upvotes: 1

Views: 490

Answers (1)

Mourner
Mourner

Reputation: 3301

The short answer is that it's currently not possible, but we're exploring the possibility of implementing this in future. This is surprisingly hard to do — algorithms for rotated label placement in polygons are very complicated and expensive. Here's the only practical implementation I could find, but it's expensive and could probably be only used as a preprocessing step (generating a point set with angles that you would then upload to Studio): https://d3plus.org/blog/behind-the-scenes/2014/07/08/largest-rect/

Upvotes: 2

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