.. image:: https://github.com/NOAA-ORR-ERD/lat_lon_parser/workflows/CI/badge.svg
:target: https://github.com/NOAA-ORR-ERD/lat_lon_parser/actions?query=workflow%3ACI
.. image:: https://img.shields.io/pypi/v/lat-lon-parser.svg
:target: https://pypi.org/project/lat-lon-parser/
.. image:: https://img.shields.io/pypi/pyversions/lat-lon-parser.svg
:target: https://pypi.org/project/lat-lon-parser/
.. image:: https://img.shields.io/github/license/NOAA-ORR-ERD/lat_lon_parser
:target: https://github.com/NOAA-ORR-ERD/lat_lon_parser/
##############
lat_lon_parser
##############
Code for parsing lat-long coordinates in "various" formats, and for converting between lat-long formats (e.g. decimal degrees to degrees-minutes-seconds)
Note: perhaps it would be better to integrate this with a more full featured lib like:
https://pypi.python.org/pypi/LatLon23
But that one does not seem to support parsing unknown formats at this point -- and it's GPL, and perhaps a little more complex and structured than it needs to be.
Parsing Latitude and Longitude strings
=======================================
Usage:
------
from lat_lon_parser import parse
.. code-block::
In [12]: from lat_lon_parser import parse
In [13]: parse("45° 12.6' W")
Out[13]: -45.21
Formats supported:
------------------
Decimal degrees (easy)::
23.43
-45.21
Decimal Degrees with quadrant::
23.43 N
45.21 W
Or with spelled out::
23.43 North
45.21 West
(note that all of the cardinal directions are not case-sensitive)
Degrees, decimal minutes: (now it starts getting tricky!)::
23° 25.800'
-45° 12.600'
or::
23 25.800'
-45 12.600'
or::
23° 25.8' N
45° 12.6' West
Degrees, Minutes, Seconds: (really fun!!!)::
23° 25' 48.0"
-45° 12' 36.0"
or::
23d 25' 48.0"
-45d 12' 36.0"
or::
23° 25' 48.0" North
45° 12' 36.0" S
or -- lots of other combinations!
For a more complete list, see the tests
How it works:
-------------
This uses a pretty "stupid" algorithm -- it assumes that all formats will be something like:
[-][space] degrees [separator] minutes [separator] seconds [separator] [N[orth]|S[outh|E[ast]|W[est]]
But that actually is pretty darn robust!
If you have other formats you want to be able to parse, please contribute tests! -- And ideally a patch if the current code doesn't work.
Conversion to Latitude Longitude Formats
========================================
Also included is code to convert to other formats used for latitude and longitude:
- degrees
- degrees minutes
- degrees minutes seconds
Converting to numbers:
----------------------
Functions for returning tuples of numbers::
>>> to_dec_deg(23, 12, 3)
23.200833333333332
>>> to_deg_min(34.1234)
(34.0, 7.404)
>>> to_deg_min_sec(34.1234)
(34.0, 7, 24.24)
Converting to strings:
----------------------
Functions for converting to various string formats::
>>> to_str_dec_deg(23, 12, 3)
'23.200833°'
>>> to_str_deg_min(2.345)
"2° 20.700'"
>>> to_str_deg_min_sec(-23.1234)
'-23° 7\' 24.24"'
>>> to_str(23.45)
'23.450000°'
>>> to_str(23, 45)
"23° 45.000'"
>>> to_str(23, 45, 6.7)
'23° 45\' 6.70"'
Raw data
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