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require 'geo_ruby/simple_features/geometry_collection'
module GeoRuby
module SimpleFeatures
#Represents a group of polygons (see Polygon).
class MultiPolygon < GeometryCollection
def initialize(srid = DEFAULT_SRID,with_z=false,with_m=false)
super(srid)
end
def binary_geometry_type #:nodoc:
6
end
def points
@points ||= geometries.inject([]) do |arr, r|
arr.concat(r.rings.map(&:points).flatten)
end
end
#Text representation of a MultiPolygon
def text_representation(allow_z=true,allow_m=true) #:nodoc:
@geometries.map {|polygon| "(" + polygon.text_representation(allow_z,allow_m) + ")"}.join(",")
end
#WKT geometry type
def text_geometry_type #:nodoc:
"MULTIPOLYGON"
end
def to_coordinates
geometries.map{|polygon| polygon.to_coordinates}
end
def as_json(options = {})
{:type => 'MultiPolygon',
:coordinates => self.to_coordinates}
end
# simple geojson representation
# TODO add CRS / SRID support?
def to_json(options = {})
as_json(options).to_json(options)
end
alias :as_geojson :to_json
#Creates a multi polygon from an array of polygons
def self.from_polygons(polygons,srid=DEFAULT_SRID,with_z=false,with_m=false)
multi_polygon = new(srid,with_z,with_m)
multi_polygon.concat(polygons)
multi_polygon
end
#Creates a multi polygon from sequences of points : ((((x,y)...(x,y)),((x,y)...(x,y)),((x,y)...(x,y)))
def self.from_coordinates(point_sequence_sequences,srid= DEFAULT_SRID,with_z=false,with_m=false)
multi_polygon = new(srid,with_z,with_m)
multi_polygon.concat( point_sequence_sequences.collect {|point_sequences| Polygon.from_coordinates(point_sequences,srid,with_z,with_m) } )
multi_polygon
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems