Python 3-D coordinate conversions
Python coordinate conversions, following convention of several popular Matlab routines.
- API docs:
For those not having:
AstroPy: lower accuracy fallback functions are included for some functions.
Numpy: without numpy, scalar inputs are handled with pure Python builtins.
Why not PyProj? PyMap3D does not require anything beyond pure Python. PyProj is very powerful and comprehensive, but requires a learning curve to use, particularly for Python users accustomed to Matlab.
- prereqs:
any of Python 2.6, 2.7, 3.3, 3.4, 3.5, 3.6, 3.7, …
- OPTIONAL prereqs:
Numpy, AstroPy (for full functionality)
Install
python -m pip install -e .
Usage
a few quick examples
import pymap3d as pm
lat,lon,alt = pm.eci2geodetic(eci, t)
az,el,range = pm.geodetic2aer(lat, lon, alt, 42, -82, 0)Functions
Popular mapping toolbox functions ported to Python include:
aer2ecef aer2enu aer2geodetic aer2ned ecef2aer ecef2enu ecef2enuv ecef2geodetic ecef2ned ecef2nedv ecef2eci eci2ecef enu2aer enu2ecef enu2ecefv enu2geodetic geodetic2aer geodetic2ecef geodetic2enu geodetic2ned ned2aer ned2ecef ned2ecefv ned2geodetic vreckon vdist azel2radec radec2azel
Caveats
Atmospheric effects neglected in all functions not invoking AstroPy. Need to update code to add these input parameters (just start a GitHub Issue to request).
Planetary perturbations and nutation etc. not fully considered.
Matlab / Octave
The matlab/ directory contains a subset of the Python conversion functions, usable from Matlab or GNU Octave. Mathworks currently charges $1000 for the Matlab Mapping Toolbox that provides these functions.
The full set of Python conversions can be accessed from Matlab >= R2014b by commands like:
lla = py.pymap3d.geodetic2ecef(x,y,z)
Matlab documentation generated by m2html.
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Release files for pymap3d 1.5.1
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