Module: NSWTopo::GeoJSON

Defined in:

lib/nswtopo/gis/geojson.rb,
lib/nswtopo/gis/geojson/point.rb,
lib/nswtopo/gis/geojson/polygon.rb,
lib/nswtopo/gis/geojson/collection.rb,
lib/nswtopo/gis/geojson/line_string.rb,
lib/nswtopo/gis/geojson/multi_point.rb,
lib/nswtopo/gis/geojson/multi_polygon.rb,
lib/nswtopo/gis/geojson/multi_line_string.rb

Defined Under Namespace

Classes: Collection, LineString, MultiLineString, MultiPoint, MultiPolygon, Point, Polygon

Constant Summary

Error =

Class.new StandardError

TYPES =

Set.new %W[Point MultiPoint LineString MultiLineString Polygon MultiPolygon]

CLASSES =

TYPES.map do |type|
  klass = Class.new do
    def initialize(coordinates, properties = {})
      properties ||= {}
      raise Error, "invalid feature properties" unless Hash === properties
      raise Error, "invalid feature geometry" unless Array === coordinates
      @coordinates, @properties = coordinates, properties
    end
    attr_accessor :coordinates, :properties

    define_method :to_h do
      {
        "type" => "Feature",
        "geometry" => {
          "type" => type,
          "coordinates" => @coordinates
        },
        "properties" => @properties
      }
    end

    extend Forwardable
    delegate %i[[] []= fetch values_at key? store clear] => :@properties
  end

  const_set type, klass
end