Skip to content

buckhx/QuadKey

Folders and files

NameName
Last commit message
Last commit date

Latest commit

author
buck heroux
Nov 11, 2014
546338f · Nov 11, 2014

History

23 Commits
Nov 11, 2014
Oct 9, 2014
Mar 19, 2014
Mar 5, 2014
Oct 10, 2014
Mar 6, 2014
Oct 9, 2014
Oct 9, 2014

Repository files navigation

QuadKey

Quad key object used for Geospatial segmentation. Based off the idea of a quadtree and used as the Bing Maps tile system.

Given a (lat, lon) and level produce a quadkey to be used in Bing Maps. Can also supply methods to generate a Google Maps TileXYZ

Built off of the TileSystem static class outlined here: http://msdn.microsoft.com/en-us/library/bb259689.aspx

Converts a lat,lon to pixel space to tile space to a quadkey

import quadkey

qk = quadkey.from_geo((-105, 40), 17)
print qk.key # => 02310101232121212 
assert qk.level is 17
tile = qk.to_tile() # => [(x, y), z]

Not a lot of documentation here, but the implementation has quite a bit, so look at the QuadKey definitions for better documention

Install

The package on pypi is quadtweet, so the recommended installation is with pip

 pip install quadkey

Methods

There are many straightforward methods, so I'll only go into detail of the unique ones

  • children()
  • parent()
  • is_ancestor()
  • is_descendent()
  • area()
  • to_geo()
  • to_tile()

####difference(to)

Gets the quadkeys between self and to forming a rectangle, inclusive.

qk.difference(to) -> [qk,,,,,to]

####unwind()

Gets a list of all ancestors in descending order by level, inclusive.

QuadKey('0123').unwind() -> ['0123','012','01','0']

About

Quad key object used for Geospatial segmentation

Resources

License

Stars

Watchers

Forks

Packages

No packages published