Example of extracting GPS coordinates from a jpeg photograph.

photogps.py

#!/usr/bin/env python3
import sys
import exifread    # sudo pip3 install exifread

def GpsEval(v):
    factor = 1.0
    sum = 0.0
    for r in v:
        sum += factor * (r.num / r.den)
        factor /= 60.0
    return sum

def GpsInfo(filename):
    with open(filename, 'rb') as infile:
        tags = exifread.process_file(infile, details=False)

    latref = None
    lonref = None
    lat = None
    lon = None
    for k,v in tags.items():
        if k == 'GPS GPSLatitudeRef':
            latref = v.values
        elif k == 'GPS GPSLongitudeRef':
            lonref = v.values
        elif k == 'GPS GPSLatitude':
            lat = GpsEval(v.values)
        elif k == 'GPS GPSLongitude':
            lon = GpsEval(v.values)

    if lat is None or lon is None:
        return None

    if latref == 'S':
        lat *= -1.0

    if lonref == 'W':
        lon *= -1.0

    return lat, lon


if __name__ == '__main__':
    if len(sys.argv) == 2:
        coords = GpsInfo(sys.argv[1])
        if coords:
            lat, lon = coords
            print('{:0.6f} {:0.6f}'.format(lat, lon))
        else:
            print('No GPS coordinates in image.')
        sys.exit(0)
    
    print('USAGE: photogps.py file.jpg')
    sys.exit(1)