Contents

require 'geo_ruby/simple_features/geometry_collection'

module GeoRuby

  module SimpleFeatures

    #Represents a group of line strings (see LineString).
    class MultiLineString < GeometryCollection

      def initialize(srid = DEFAULT_SRID,with_z=false,with_m=false)
        super(srid)
      end

      def binary_geometry_type #:nodoc:
        5
      end

      def points
        geometries.map(&:points).flatten
      end

      #Text representation of a multi line string
      def text_representation(allow_z=true,allow_m=true) #:nodoc:
        @geometries.collect{|line_string| "(" + line_string.text_representation(allow_z,allow_m) + ")" }.join(",")
      end

      #WKT geometry type
      def text_geometry_type #:nodoc:
        "MULTILINESTRING"
      end

      def to_line_string(join = true)
        LineString.from_points(points)
      end
      
      def to_coordinates
        geometries.map{|ls| ls.to_coordinates}
      end

      # simple geojson representation
      # TODO add CRS / SRID support?
      def to_json(options = {})
        {:type => 'MultiLineString',
         :coordinates => self.to_coordinates}.to_json(options)
      end
      alias :as_geojson :to_json
      
      #Creates a new multi line string from an array of line strings
      def self.from_line_strings(line_strings,srid=DEFAULT_SRID,with_z=false,with_m=false)
        multi_line_string = new(srid,with_z,with_m)
        multi_line_string.concat(line_strings)
        multi_line_string
      end

      #Creates a new multi line string from sequences of points : (((x,y)...(x,y)),((x,y)...(x,y)))
      def self.from_coordinates(point_sequences,srid=DEFAULT_SRID,with_z=false,with_m=false)
        multi_line_string = new(srid,with_z,with_m)
        multi_line_string.concat(point_sequences.collect {|points| LineString.from_coordinates(points,srid,with_z,with_m) })
        multi_line_string
      end
    end
  end
end

Version data entries

4 entries across 4 versions & 2 rubygems

Version	Path
georuby-1.9.3	lib/geo_ruby/simple_features/multi_line_string.rb
nofxx-georuby-1.9.2	lib/geo_ruby/simple_features/multi_line_string.rb
nofxx-georuby-1.9.1	lib/geo_ruby/simple_features/multi_line_string.rb
nofxx-georuby-1.9.0	lib/geo_ruby/simple_features/multi_line_string.rb