Skip to main content

Python module for interacting with geohashes

Project description

neathgeohash

Coverage Status travis status

Neathgeohash is a Python module that provides functions for finding an approximation of an ellipsoid (a surface) with a set of geohashes. Assuming that the ellipsoid represents positioning error EEP the module computes probability for each goehash covered by ellipsoid. The geohash approximation can be retrieved as geojson.

The example shows ellipsoid with the ellipse center at 51.00 lattitude and 0 longitude and 305m major and 385m minor

Example 1::

import neathgeohash
ellipse = ngh.Ellipse(51, 0, 305, 385, 0)
ellipse_as_ghl = ellipse.estimate_probability_coverage_with_fixed_geohash_depth()
print(ellipse_as_ghl)

{'gcpfpur': 0.0701562499999992, 'gcpfpuq': 0.05140624999999959, 'gcpfpuw': 0.020625000000000015, 
'gcpfpux': 0.02828125000000002, 'u1040h8': 0.02781250000000002, 'u1040h2': 0.06640624999999928, 
'u1040h0': 0.06609374999999929, 'gcpfpun': 0.048437499999999654, 'gcpfpum': 0.03515624999999994, 
'gcpfput': 0.013906250000000009, 'gcpfpup': 0.060624999999999395, 'gcpfpuj': 0.02734375000000002, 
'gcpfpuv': 0.0031250000000000006, 'gcpfpuy': 0.004843750000000002, 'gcpfpuz': 0.005468750000000002, 
'u1040hb': 0.0029687500000000005, 'u1040hc': 0.00234375, 'u1040h9': 0.021562500000000016, 
'u1040h3': 0.05515624999999951, 'u1040h1': 0.048437499999999654, 'u10405c': 0.018750000000000013, 
'gcpfpgz': 0.022812500000000017, 'gcpfpgv': 0.011093750000000006, 'gcpfpuk': 0.01687500000000001, 
'gcpfpus': 0.008437500000000004, 'gcpfpuh': 0.01484375000000001, 'gcpfpuu': 0.0009375000000000001, 
'u10405b': 0.024062500000000018, 'gcpfpgy': 0.01703125000000001, 'gcpfpgu': 0.0057812500000000025, 
'gcpfpvn': 0.00015625, 'gcpfpvp': 0.00015625, 'u1040j0': 0.000625, 'u1040j1': 0, 'u1040hf': 0.0009375000000000001, 
'u1040hd': 0.01625000000000001, 'u1040h6': 0.03281249999999999, 'u1040h4': 0.028593750000000022, 
'u10405f': 0.010312500000000006, 'u10405d': 0.00109375, 'u104058': 0.0028125000000000003, 
'gcpfpgw': 0.0017187499999999998, 'gcpfpgs': 0.000625, 'gcpfpu7': 0.005937500000000003, 
'gcpfpue': 0.0018749999999999997, 'gcpfpu5': 0.005937500000000003, 'gcpfpug': 0.00046875, 
'gcpfpgg': 0.0020312499999999996, 'u104059': 0.005312500000000002, 'gcpfpgx': 0.003906250000000001, 
'gcpfpgt': 0.0021874999999999998, 'gcpfpge': 0.00015625, 'u1040hg': 0.000625, 'u1040he': 0.006718750000000003, 
'u1040h7': 0.01609375000000001, 'u1040h5': 0.01593750000000001, 'u10405g': 0.004218750000000001, 
'u10405e': 0.00078125, 'u1040hu': 0.00046875, 'u1040hs': 0.00140625, 'u1040hk': 0.005000000000000002, 
'u1040hh': 0.007031250000000004, 'u10405u': 0.0015624999999999999, 'u10405s': 0.00046875}

Example 2::

Example

To see image follow the url: https://github.com/mpdwulit/neathgeohash/blob/master/samples/ellipse_coverage.geojson

TODO

  1. Add more efficient implementation for finding geohash coverage
  2. Add Box-Muller Sampling from multivariate normal distribution
  3. Improve Monte Carlo integration

License

Copyright (c) 2020 Marek Dwulit

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Keywords

Geohash, GIS, latitude, longitude, encode, decode, Galileo, GPS, WGS84, coordinates, geotagging.

Project details


Release history Release notifications

This version

0.4.0

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for neathgeohash, version 0.4.0
Filename, size File type Python version Upload date Hashes
Filename, size neathgeohash-0.4.0-py2.py3-none-any.whl (8.3 kB) File type Wheel Python version py2.py3 Upload date Hashes View
Filename, size neathgeohash-0.4.0.tar.gz (6.8 kB) File type Source Python version None Upload date Hashes View

Supported by

Pingdom Pingdom Monitoring Google Google Object Storage and Download Analytics Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page