Class: Geos::GeometryCollection

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/geos/yaml/syck.rb,
lib/geos/geometry_collection.rb

Direct Known Subclasses

MultiLineString, MultiPoint, MultiPolygon

Instance Method Summary collapse

Instance Method Details

#[](*args) ⇒ Object Also known as: slice

Returns the nth geometry from the collection.



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# File 'lib/geos/geometry_collection.rb', line 18

def [](*args)
  self.to_a[*args]
end

#as_geojson(options = {}) ⇒ Object Also known as: to_geojsonable 



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# File 'lib/geos/geometry_collection.rb', line 53

def as_geojson(options = {})
  {
    :type => 'GeometryCollection',
    :geometries => self.to_a.collect { |g| g.to_geojsonable(options) }
  }
end

#as_json(options = {}) ⇒ Object Also known as: to_jsonable

Returns a Hash suitable for converting to JSON.



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# File 'lib/geos/geometry_collection.rb', line 30

def as_json(options = {})
  self.collect do |p|
    p.to_jsonable options
  end
end

#dump_points(cur_path = []) ⇒ Object

Dumps points similarly to the PostGIS ST_DumpPoints function.



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# File 'lib/geos/geometry_collection.rb', line 62

def dump_points(cur_path = [])
  self.each do |geom|
    cur_path << geom.dump_points
  end
  cur_path
end

#each ⇒ Object

Iterates the collection through the given block.



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# File 'lib/geos/geometry_collection.rb', line 10

def each
  self.num_geometries.times do |n|
    yield self.get_geometry_n(n)
  end
  nil
end

#last ⇒ Object

Returns the last geometry from the collection.



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# File 'lib/geos/geometry_collection.rb', line 25

def last
  self.get_geometry_n(self.num_geometries - 1) if self.num_geometries > 0
end

#to_georss(*args) ⇒ Object

Build some XmlMarkup for GeoRSS. Since GeoRSS is pretty trimed down, we just take the entire collection and use the exterior_ring as a Polygon. Not to bright, mind you, but until GeoRSS stops with the suck, what are we to do. You should include the appropriate georss and gml XML namespaces in your document.



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# File 'lib/geos/geometry_collection.rb', line 49

def to_georss(*args)
  self.exterior_ring.to_georss(*args)
end

#to_kml(*args) ⇒ Object

Build some XmlMarkup for KML.



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# File 'lib/geos/geometry_collection.rb', line 38

def to_kml(*args)
  self.collect do |p|
    p.to_kml(*args)
  end
end