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#!/usr/bin/python |
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# Author: Steven D. Lander, RGi |
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# March 17, 2016 |
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from collections import namedtuple |
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TileRange = namedtuple("TileRange", ["min", "max"]) |
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def iterate_tiles(z, range_x, range_y, **kwargs): |
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try: |
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base_url = kwargs["base_url"] |
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except(AttributeError, KeyError): |
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base_url = "" |
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try: |
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file_ext = kwargs["file_ext"] |
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if "." not in file_ext: |
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raise ValueError("file_ext needs a period in it.") |
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except(AttributeError, KeyError): |
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file_ext = "" |
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except(ValueError): |
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raise |
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if type(range_x) is not TileRange or \ |
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type(range_y) is not TileRange: |
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raise KeyError("z/x/y ranges must be TileRange objects") |
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tmpl = "{}{}/{}/{}{}" |
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tile_urls = [] |
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for x in range(range_x.min, range_x.max+1): |
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for y in range(range_y.min, range_y.max+1): |
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tile_urls.append(tmpl.format(base_url, z, x, y, file_ext)) |
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return tile_urls |
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# Print all these URLs out to the console, so they can |
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# be piped to output if desired |
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base_url = "http://example/url/" |
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file_ext = ".png" |
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tasks = [ |
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(1, TileRange(0, 3), TileRange(0, 3)), # All zoom 1 tiles (EPSG:3857) |
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# (7, TileRange(0, 2**7), TileRange(0, 2**(7-1))), # All zoom 7 tiles (EPSG:4326) |
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# (16, TileRange(0, 2**16), TileRange(0, 2**16)), # All zoom 16 tiles (EPSG:3857) |
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] |
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for task in tasks: |
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level = iterate_tiles(task[0], task[1], task[2], base_url=base_url, |
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file_ext=file_ext) |
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for entry in level: |
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print(entry) |
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GitHubRGI /
geopackage-python
