"+nadgrids=@null", "+no_defs +over"])
# width/height of the spherical mercator projection
- SIZE=40075016.6855784
+ SIZE = 40075016.6855784
# the size of the meta tile blocks
METATILE = 8
# the directory root for meta tiles
HASH_ROOT = "/tiles/default/"
# node cache file
- NODE_CACHE_FILE="/store/database/nodes"
+ NODE_CACHE_FILE = "/store/database/nodes"
# turns a spherical mercator coord into a tile coord
- def Expire.tile_from_merc(point, zoom)
+ def self.tile_from_merc(point, zoom)
# renormalise into unit space [0,1]
point.x = 0.5 + point.x / SIZE
point.y = 0.5 - point.y / SIZE
# transform into tile space
- point.x = point.x * 2 ** zoom
- point.y = point.y * 2 ** zoom
+ point.x = point.x * 2**zoom
+ point.y = point.y * 2**zoom
# chop of the fractional parts
[point.x.to_int, point.y.to_int, zoom]
end
# turns a latlon -> tile x,y given a zoom level
- def Expire.tile_from_latlon(latlon, zoom)
+ def self.tile_from_latlon(latlon, zoom)
# first convert to spherical mercator
point = PROJ.forward(latlon)
tile_from_merc(point, zoom)
end
# this must match the definition of xyz_to_meta in mod_tile
- def Expire.xyz_to_meta(x, y, z)
+ def self.xyz_to_meta(x, y, z)
# mask off the final few bits
x &= ~(METATILE - 1)
y &= ~(METATILE - 1)
# generate the path
- hash_path = (0..4).collect { |i|
- (((x >> 4*i) & 0xf) << 4) | ((y >> 4*i) & 0xf)
- }.reverse.join('/')
+ hash_path = (0..4).collect do |i|
+ (((x >> 4 * i) & 0xf) << 4) | ((y >> 4 * i) & 0xf)
+ end.reverse.join('/')
z.to_s + '/' + hash_path + ".meta"
end
EXPIRY_TIME = Time.parse("2000-01-01 00:00:00")
# expire the meta tile by setting the modified time back
- def Expire.expire_meta(meta)
+ def self.expire_meta(meta)
puts "Expiring #{meta}"
File.utime(EXPIRY_TIME, EXPIRY_TIME, meta)
end
- def Expire.expire(change_file, min_zoom, max_zoom, tile_dirs)
+ def self.expire(change_file, min_zoom, max_zoom, tile_dirs)
do_expire(change_file, min_zoom, max_zoom) do |set|
new_set = Set.new
meta_set = Set.new
end
end
- def Expire.do_expire(change_file, min_zoom, max_zoom, &_)
+ def self.do_expire(change_file, min_zoom, max_zoom, &_)
# read in the osm change file
doc = XML::Document.file(change_file)
# hash map to contain all the nodes
- nodes = Hash.new
+ nodes = {}
# we put all the nodes into the hash, as it doesn't matter whether the node was
# added, deleted or modified - the tile will need updating anyway.
node_cache = NodeCache.new(NODE_CACHE_FILE)
doc.find('//way/nd').each do |node|
node_id = node['ref'].to_i
- unless nodes.include? node_id
- # this is a node referenced but not added, modified or deleted, so it should
- # still be in the node cache.
- if entry = node_cache[node_id]
- point = Proj4::Point.new(entry.lon, entry.lat)
- nodes[node_id] = tile_from_merc(point, max_zoom)
- end
+
+ next if nodes.include? node_id
+
+ # this is a node referenced but not added, modified or deleted, so it should
+ # still be in the node cache.
+ if entry = node_cache[node_id]
+ point = Proj4::Point.new(entry.lon, entry.lat)
+ nodes[node_id] = tile_from_merc(point, max_zoom)
end
end
if id <= @max_id
offset = 16 + id * 8
- lon, lat = @cache[offset .. offset+7].unpack("ll")
+ lon, lat = @cache[offset..offset + 7].unpack("ll")
if lon != -2147483648 && lat != -2147483648
node = Node.new(lon, lat)