placekey 0.0.4

Utilities for working with Placekeys

Placekey-py

A Python library for working with Placekeys. Documentation for this package can be found here, and documentation for the Placekey service API can be found here.

Usage

The basic functionality of the Placekey library is conversion between Placekeys and latitude-longitude coordinates.

>>> import placekey as pk
>>> lat, long = 0.0, 0.0
>>> pk.geo_to_placekey(lat, long)
'@dvt-smp-tvz'

>>> pk.placekey_to_geo('@dvt-smp-tvz')
(0.00018033323813810344, -0.00018985758738881587)

The library also allows for conversion between Placekeys and H3 indices.

>>> pk.placekey_to_h3('@dvt-smp-tvz')
'8a754e64992ffff'

>>> pk.h3_to_placekey('8a754e64992ffff')
'@dvt-smp-tvz'

The distance in meters between two Placekeys can be found with the following function.

>>> pk.placekey_distance('@dvt-smp-tvz', '@5vg-7gq-tjv')
12795124.895573696

An upper bound on the maximal distance in meters between two Placekeys based on the length of their shared prefix is provided by placekey.get_prefix_distance_dict().

>>> pk.get_prefix_distance_dict()
{0: 20040000.0,
 1: 20040000.0,
 2: 2777000.0,
 3: 1065000.0,
 4: 152400.0,
 5: 21770.0,
 6: 8227.0,
 7: 1176.0,
 8: 444.3,
 9: 63.47}

Placekeys found in a data set can be partially validated by

>>> pk.placekey_format_is_valid('222-227@dvt-smp-tvz')
True

>>> pk.placekey_format_is_valid('@123-456-789')
False

Notebooks

Jupyter notebooks demonstrating various Placekey functionality are contained in the placekey-notebooks repository.

Support

This package runs on Python 3.