railroad centroids

[missinglink]

we should not import railways as the centroid is not necessarily anywhere near a station!

eg. http://www.openstreetmap.org/way/46340228

this gives the impression you can find a station at the centroid, which is not true.

    {
      "type": "Feature",
      "properties": {
        "marker-color": "#00ff00",
        "id": "46340228",
        "layer": "osmway",
        "name": "BMT Broadway Line",
        "alpha3": "USA",
        "admin0": "United States",
        "admin1": "New York",
        "admin1_abbr": "NY",
        "admin2": "New York County",
        "local_admin": "Manhattan",
        "locality": "New York",
        "neighborhood": "Flatiron District",
        "category": [
          "transport",
          "transport:rail"
        ],
        "address": {},
        "text": "BMT Broadway Line, Manhattan, NY"
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -73.990444,
          40.743142
        ]
      }
    },

[missinglink]

related: #19

[missinglink]

see: https://github.com/Turfjs/turf-point-on-surface

[riordan]

Perhaps the approach of incorporating the geometry's boundingbox from pelias-deprecated/quattroshapes#29 would make sense here?