Class: Wukong::Geo::Quadtile

Inherits:
Object
  • Object
show all
Includes:
Gorillib::Model
Defined in:
lib/wu/geo/quadtile.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.from_whatever(hsh) ⇒ Object 



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# File 'lib/wu/geo/quadtile.rb', line 19

def self.from_whatever(hsh)
  zl = hsh[:zl] ? hsh[:zl].to_i : nil
  case
  when hsh[:tile_x].present? && hsh[:tile_y].present? && zl.present?
    tile_x, tile_y = [hsh[:tile_x], hsh[:tile_y]]
  when hsh[:longitude].present? && hsh[:latitude].present? && zl.present?
    tile_x, tile_y = Wukong::Geolocated.lng_lat_zl_to_tile_xy(hsh[:longitude], hsh[:latitude], zl)
  when hsh[:quadkey].present?
    quadkey = hsh[:quadkey]
    quadkey = quadkey[0..zl] if zl.to_i > 0
    tile_x, tile_y, zl = Wukong::Geolocated.quadkey_to_tile_xy_zl(quadkey)
  else
    raise ArgumentError, "You must supply keys for either `:longitude`, `:latitude` and `:zl`; `:tile_x`, `:tile_y` and `:zl`; or `:quadkey`: #{hsh.inspect}"
  end
  return new(tile_x, tile_y, zl, hsh.to_hash)
end

.tileserver_conn ⇒ Object 



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# File 'lib/wu/geo/quadtile.rb', line 36

def self.tileserver_conn
  @tileserver_conn = Faraday.new(:url => tileserver_url_base)
end

Instance Method Details

#basename(options = {}) ⇒ Object

A

Examples:

qt = Quadtile.from_whatever(longitude: -97.759003, latitude: 30.273884, zl: 15)
qt.slug  # tile-15-64587


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# File 'lib/wu/geo/quadtile.rb', line 52

def basename(options={})
  options = { sep: '-', ext: 'png'}
  sep = options[:sep]
  # "%s%s%02d%s%04d%s%04d.%s" % [slug, sep, zl, sep, tile_x, sep, tile_y, options[:ext]]
  "%s/%02d/%s%s%s.%s" % [slug, zl, slug, sep, quadkey, options[:ext]]
end

#fetch ⇒ Object

Fetch the contents of a map tile from a tileserver

You are responsible for requiring the faraday library and its adapter



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# File 'lib/wu/geo/quadtile.rb', line 63

def fetch
  self.class.tileserver_conn.get(tile_url)
end

#packed_qk ⇒ Object 



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# File 'lib/wu/geo/quadtile.rb', line 12

def packed_qk ; Wukong::Geolocated.tile_xy_zl_to_packed_qk(tile_x, tile_y, zl) ; end

#quadkey ⇒ Object 



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# File 'lib/wu/geo/quadtile.rb', line 11

def quadkey   ; Wukong::Geolocated.tile_xy_zl_to_quadkey(  tile_x, tile_y, zl) ; end

#tile_url ⇒ Object 



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# File 'lib/wu/geo/quadtile.rb', line 40

def tile_url
  [tileserver_url_base, zl, tile_x, tile_y].join('/') << ".png"
end