[GIS] In MapBox Studio, how to create a centred label of a polygon created from shapefile

labelingmapboxmapbox-studioshapefile

To get the undesired result below, I:

Uploaded a zipped shapefile to MapBox Studio.
Using the shape, created a layer of polygons to display area boundaries.
Using the same shape, created a text layer to label areas with their names.

Labels appear on the lines:

How can I make labels appear in the centre of the polygons?

Best Answer

The feature of calculating label points for polygons on the client is currently in progress and will appear in one of the next releases. See:

https://github.com/mapbox/mapbox-gl-js/pull/2678 for the outstanding pull request
https://github.com/mapbox/polylabel for the novel algorithm I designed that will be used for this

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[GIS] Mapbox Studio best practices for line text-placement? Can you force 1 label per segment

Setting the text-avoid-edges attribute to true probably can help. This should place the labels near the center of the tile, so they are less likely to be cut.

//source for strait label data is jfactory.11d0a600
#strait_labels [zoom=12] {
  text-name: [name];
  text-character-spacing: 7;
  text-face-name: "Quintessential Regular";
  text-fill: darken(saturate(@water, 20), 10);
  text-halo-fill: @glacier;
  text-halo-radius: 1;
  text-halo-rasterizer: fast;
  text-size: 36;
  text-placement: line;
  text-spacing: 360; //ineffective?
  text-opacity: .7;
  text-repeat-distance: 10; //ineffective? 

  //try this:
  text-avoid-edges: true;
}

[GIS] Exporting vector tiles from Mapbox Studio

You can always export MBTiles (vector tiles) using Mapbox Studio, but only using the oldest version (Mapbox Studio Classic). It have options to import many formats and can export MBTiles. Notice that it is a standalone application MapBox Studio Classic.

Best Answer

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[GIS] Mapbox Studio best practices for line text-placement? Can you force 1 label per segment

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