A pure Python implementation of
geodesy tools for various ellipsoidal
and spherical earth models using precision trigonometric, vector-based,
elliptic and approximate methods for geodetic (lat-/longitude) and
geocentric (ECEF cartesian) coordinates.
Also included are modules for conversions to and from Cassini-Soldner, ECEF (Earth-Centered, Earth-Fixed cartesian), UPS (Universal Polar Stereographic), UTM (Exact and Universal Transverse Mercator) and Web Mercator (Pseudo-Mercator) coordinates, MGRS (NATO Military Grid Reference System) and OSGR (British Ordinance Survery Grid Reference) grid references, TRF (Terrestrial Reference Frames) and modules to encode and decode EPSG, Geohashes, Georefs (WGRS) and Garefs (GARS) .
Other modules provide Albers Equal-Area projections, azimuthal projections and Lambert conformal conic projections and positions (from John P. Snyder, Map Projections -- A Working Manual, 1987), functions to clip a path or polygon of LatLon points using the Cohen-Sutherland and the Sutherland-Hodgman methods, functions to simplify or linearize a path of LatLon points (or a numpy array), including implementations of the Ramer-Douglas-Peucker, the Visvalingam-Whyatt and the Reumann-Witkam algorithms and modified versions of the former. Other classes interpolate the height of LatLon points and several Geoid models or compute various Fréchet or Hausdorff distances.
To install PyGeodesy, type
pip install PyGeodesy or
PyGeodesy in a terminal or command window.
PyGeodesy-yy.m.d.zip from PyPI or GitHub,
unzip the downloaded file,
cd to directory
python setup.py install. To run all PyGeodesy tests, type
python test/run.py or type
python test/unitTestSuite.py before
or after installation.
Installation of geographiclib, numpy and scipy is optional. However, the former is required to use classes EquidistantKarney, GnomonicKarney, CassiniSoldner and Css and function toCss, for module ellipsoidalKarney classes LatLon and Cartesian and functions areaOf, intersections2 and perimeterOf and for the HeightIDWkarney interpolator. Both the latter are needed for the Geoid... and Height... interpolator classes, except the GeoidKarney and all HeightIDW... classes.
In addition to the
pygeodesy package, the PyGeodesy distribution
files contain the tests, the test results (on macOS only) and the
complete documentation generated by Epydoc using command line:
epydoc --html --no-private --no-source --name=PyGeodesy --url=... -v
The tests have been run with Python 3.9.0 (with geographiclib 1.50),
Python 3.8.6 (with geographiclib 1.50, numpy 1.19.2 and scipy 1.5.2)
and macOS' Python 2.7.16 (with numpy 1.16.6), all on macOS 10.15.7
Catalina and all in 64-bit only. The tests run with and without
import for Python 3. The results of those tests are included in the
Test coverage has been measured with coverage 4.5.4 using Python 3.9.0 (with geographiclib 1.50), Python 3.8.6 (with geographiclib 1.50, numpy 1.19.2 and scipy 1.5.2) and macOS' Python 2.7.16 (with numpy 1.16.6). The complete coverage report in HTML and a PDF summary are included in the distribution files.
The tests also ran with Python 2.7.14, 3.6.3, 3.7.1, 3.8.0 and PyPy 7.1.1 (Python 2.7.13 and 3.6.1) (and geographiclib 1.49 or 1.50) on Ubuntu 14.04 and with Python 3.7.3 (and geographiclib 1.49 or 1.50) on Debian 9 all in 64-bit only and with Python 2.7.15, 3.6.8, 3.7.2 and 3.8.0 (all with geographiclib 1.49 or 1.50) on Windows Server 2012R2 in both 32- and 64-bit.
A single-File and single-Directory application with
been bundled using PyInstaller 3.4 and 64-bit Python 3.7.3 and 3.7.4
on macOS 10.13.6 High Sierra.
Previously, the tests were run with Python 2.6.9 (and numpy 1.6.2), 2.7.10 (and numpy 1.8.0rc1), 2.7.13 thru 2.7.17 (and numpy 1.13.1, 1.14.0, 1.15.2, 1.16.2, 1.16.5 or 1.19.0, scipy 1.5.0), 3.5.3, 3.6.2 thru 3.6.5, 3.7.0, 3.7.2 thru 3.7.6, 3.8 thru 3.8.5, PyPy 6.0.0 (Python 2.7.13 and 3.5.3), PyPy 7.3.0 (Python 2.7.13 and 3.6.9) and Intel-Python 3.5.3 (and numpy 1.11.3) on MacOS X 10.10 Yosemite, MacOS X 10.11 El Capitan, macOS 10.12 Sierra, macOS 10.13.6 High Sierra, macOS 10.14 Mojave and/or macOS 10.15.3, 10.15.5 and 10.15.6 Catalina, with Pythonista 3.1 on iOS 10.3.3, 11.0.3, 11.1.2 and 11.3 on iPad4, with Pythonista 3.2 (with geographiclib 1.49 or 1.50 and numpy 1.8.0) on iOS 11.4.1, 12.0, 12.2 and 12.3 on iPad4, iPhone6 and/or iPhone10, all in 64-bit only and with 32-bit Python 2.6.6 on Windows XP SP3 and with 32-bit Python 2.7.14 on Windows 10 Pro.
All Python source code has been statically checked with PyChecker, PyFlakes, PyCodeStyle (formerly Pep8) and McCabe using Python 2.7.18 and with Flake8 using Python 3.9.0, both in 64-bit on macOS 10.15.6 Catalina.
Last updated: Oct 20, 2020.
Copyright (C) 2016-2020 -- mrJean1 at Gmail -- All Rights Reserved.
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