api for declination and isogonic lines using the WMM20 spherical harmonics model.

to see isogonic lines view the live map: [https://isogonic-map.herokuapp.com/]

Adapted from the geomagc software and World Magnetic Model of the NOAA Satellite and Information Service, National Geophysical Data Center http://www.ngdc.noaa.gov/geomag/WMM/DoDWMM.shtml

Calculations forked from: [https://github.com/cmweiss/geomag/]

poetry install

https://isogonic-api.herokuapp.com/?lng=144.59537716183365&lat=-38.152063150975806&altitude_km=0&day=21&mth=8&yr=2020
https://isogonic-api.herokuapp.com/isogon?yr=2020

Use the poetry buildpack to deploy to heroku

heroku buildpacks:clear
heroku buildpacks:add https://github.com/moneymeets/python-poetry-buildpack.git
heroku buildpacks:add heroku/python
git push heroku master

To create a release use the command. If it complains you will need to pip install wheel first.

python setup.py bdist_wheel

See [https://www.ngdc.noaa.gov/geomag/WMM/]