Summary Structure of GeoJSON written by PlantUML

GeoJSON.puml

@startuml
title GeoJSON
hide methods

abstract class GeoJson {
  type : String
  bbox : Double[0..2n]
}

class FeatureCollection {
  type : String = "FeatureCollection"
  features : Feature[0..*]
}

class Feature {
  type : String = "Feature"
  geometry : Geometry[0..1]
  properties : Object[0..1]
  id : String or Number
}

abstract class Geometry {
}

class GeometryCollection {
  type : String = "GeometryCollection"
  geometries : Geometry[0..*]
}

GeoJson <|-- FeatureCollection
GeoJson <|-- Feature
GeoJson <|-- Geometry

Geometry <|-up- GeometryCollection

GeometryCollection o-- Geometry
FeatureCollection o-- Feature

note top of GeoJson
  The coordinate reference system for all GeoJSON 
  coordinates is a geographic coordinate reference 
  system, using WGS 84 datum, with longitude and 
  latitude units of decimal degrees.
end note

note right of GeoJson
  bbox "Bounding Box" has 2 points.
    1st : the most southwesterly point
    2nd : the more northeasterly point
end note

note bottom of Geometry
  "n" is two or more elements. for example
    [longitude, latitude, (altitude or elevation)]
    [easting, northing, (altitude or elevation)]
end note

@enduml