r.circle([longitude, latitude], radius[, {:num_vertices => 32, :geo_system => 'WGS84', :unit => 'm', :fill => true}]) → geometry r.circle(point, radius[, {:num_vertices => 32, :geo_system => 'WGS84', :unit => 'm', :fill => true}]) → geometry
Construct a circular line or polygon. A circle in RethinkDB is a polygon or line approximating a circle of a given radius around a given center, consisting of a specified number of vertices (default 32).
The center may be specified either by two floating point numbers, the latitude (−90 to 90) and longitude (−180 to 180) of the point on a perfect sphere (see Geospatial support for more information on ReQL’s coordinate system), or by a point object. The radius is a floating point number whose units are meters by default, although that may be changed with the unit
argument.
Optional arguments available with circle
are:
num_vertices
: the number of vertices in the polygon or line. Defaults to 32.geo_system
: the reference ellipsoid to use for geographic coordinates. Possible values are WGS84
(the default), a common standard for Earth’s geometry, or unit_sphere
, a perfect sphere of 1 meter radius.unit
: Unit for the radius distance. Possible values are m
(meter, the default), km
(kilometer), mi
(international mile), nm
(nautical mile), ft
(international foot).fill
: if true
(the default) the circle is filled, creating a polygon; if false
the circle is unfilled (creating a line).Example: Define a circle.
r.table('geo').insert({ :id => 300, :name => 'Hayes Valley', :neighborhood => r.circle([-122.423246,37.779388], 1000) }).run(conn)
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https://rethinkdb.com/api/ruby/circle/