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rossengeorgiev / aprs-python

📡 Python module for working with APRS
http://aprs-python.readthedocs.io/en/latest/
GNU General Public License v2.0
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Question about coordinates conversion #51

Closed sp2ong closed 5 years ago

sp2ong commented 5 years ago

How to use aprslib to convert compressed coordinates to decimal format?

lat=aprslib.xxxxx("4903.50N") long=aprslib.xxxx("07201.75W")

rossengeorgiev commented 5 years ago

Hi @sp2ong, there isn't a function to do it. Here is the relevant code:

https://github.com/rossengeorgiev/aprs-python/blob/94b89a6da47a322129484efcaf1e82f6a9932891/aprslib/parsing/position.py#L99-L100

sp2ong commented 5 years ago

Thank you for replay. I have try use

import aprslib from aprslib import base91

lat = 90 - (base91.to_decimal("5303.52N") / 380926.0) print lat

but result is strange:

-2740265826.18

rossengeorgiev commented 5 years ago

That is not compressed. That is just degrees, minutes and direction. There is no convenient function available to convert them to decimal format. The relevant code is here:

https://github.com/rossengeorgiev/aprs-python/blob/94b89a6da47a322129484efcaf1e82f6a9932891/aprslib/parsing/position.py#L132-L192

sp2ong commented 5 years ago

Ok, thank you for repaly