地図タイルとそのタイルの子孫を

README.md

tile_children

あるタイルの子孫の一覧を取得する

USAGE

chmod +x tile_children.py
./tile_children.py [parent tile] [maxzoom] [suffix]

EXAMPLE

$ ./tile_children.py 0/0/0 1 .png
getting children of: 0/0/0 until zoom 1
0/0/0.png
1/0/0.png
1/1/0.png
1/1/1.png
1/0/1.png

$ ./tile_children.py 8/220/105 10 .png
getting children of: 8/220/105 until zoom 10
8/220/105.png
9/440/210.png
10/880/420.png
10/881/420.png
10/881/421.png
10/880/421.png
9/441/210.png
10/882/420.png
10/883/420.png
10/883/421.png
10/882/421.png
9/441/211.png
10/882/422.png
10/883/422.png
10/883/423.png
10/882/423.png
9/440/211.png
10/880/422.png
10/881/422.png
10/881/423.png
10/880/423.png

USAGE WITH OTHER TOOLS

$ ./tile_children.py 8/220/105 10 .png > tiles_to_delete.txt
getting children of: 8/220/105 until zoom 10
$ wc -l tiles_to_delete.txt
21 tiles_to_delete.txt
$ cat tiles_to_delete.txt | xargs rm -v
...

tile_children.py

#!/usr/bin/env python3

import sys

def get_children(tile):
  return [
    [tile[0] * 2, tile[1] * 2, tile[2] + 1],
    [tile[0] * 2 + 1, tile[1] * 2, tile[2 ] + 1],
    [tile[0] * 2 + 1, tile[1] * 2 + 1, tile[2] + 1],
    [tile[0] * 2, tile[1] * 2 + 1, tile[2] + 1]
  ]

def print_children_of_tile_until(tile, suffix, zoom):
  if tile[2] == zoom:
    return
  for child in get_children(tile):
    x, y, z = child
    print(f"{z}/{x}/{y}{suffix}")
    print_children_of_tile_until(child, suffix, zoom)

def main():
  tile = map(int, sys.argv[1].split('/'))
  maxZoom = int(sys.argv[2])
  suffix = sys.argv[3]
  z, x, y = tile
  print(f"getting children of: {z}/{x}/{y} until zoom {maxZoom}", file=sys.stderr)
  parent_tile = [x, y, z]
  print(f"{z}/{x}/{y}{suffix}")
  print_children_of_tile_until(parent_tile, suffix, maxZoom)

if __name__ == '__main__':
  main()