whosonfirst-geometries

Types of geometries in Who's On First, and their meaning.

Caveat

This document should still be considered a work-in-progress

Polygons

This section (polygons) is out of date and needs to be updated to describe the syntax for "alt" geometries. See also: https://github.com/whosonfirst/whosonfirst-cookbook/blob/master/how_to/creating_alt_geometries.md

cloropleth

consensus

This is a placeholder label. It is a terrible name. We just haven't found a better one yet.

display

geocode

groundtruth

reversegeo

Centroids

geom

  • common
  • The math centroid of the area polygon.

intersection

  • optional
  • n/a

lbl

  • common
  • Where the label should be displayed.

local

  • optional
  • Where do locals from this place consider the "center".
  • common-optional
  • Snapped to nearest road and used to provide accurate turn-by-turn directions and navigation ETAs (expected time of arrivals).

reversegeo

  • common-optional
  • Used for point-in-polygon (PIP) processing.

tourist

  • optional
  • Tourists follow guides and flock towards famous attractions.

See also