Shows geolocation stored in EXIF of image

show_geolocation.py

#!/usr/bin/env python

import argparse
try:
    from PIL import Image
    from PIL.ExifTags import TAGS, GPSTAGS
except ImportError:
    print "You need to install PIL. Please check: http://www.pythonware.com/products/pil/"

def decode_gps_info(exif):
    gpsinfo = {}
    if 'GPSInfo' in exif:
        for key in exif['GPSInfo'].keys():
            decode = GPSTAGS.get(key,key)
            gpsinfo[decode] = exif['GPSInfo'][key]
        exif['GPSInfo'] = gpsinfo

def get_exif_metadata(image_path):
    ret = {}
    image = Image.open(image_path)
    if hasattr(image, '_getexif'):
        exifinfo = image._getexif()
        if exifinfo is not None:
            for tag, value in exifinfo.items():
                decoded = TAGS.get(tag, tag)
                ret[decoded] = value
    decode_gps_info(ret)
    return ret

def convert_to_decimal(lon, lat):
    return (to_decimal(lat[0][0], lat[0][1],
                        lat[1][0], lat[1][1],
                        lat[2][0], lat[2][1]),
            to_decimal(lon[0][0], lon[0][1],
                        lon[1][0], lon[1][1],
                        lon[2][0], lon[2][1]))

def to_decimal(degree_num, degree_den, minute_num, minute_den,
                     second_num, second_den):
    """Converts the Degree/Minute/Second formatted GPS data to decimal degrees.

    Args:
    degree_num: The numerator of the degree object.
    degree_den: The denominator of the degree object.
    minute_num: The numerator of the minute object.
    minute_den: The denominator of the minute object.
    second_num: The numerator of the second object.
    second_den: The denominator of the second object.

    Returns:
    A deciminal degree.
    """
    degree = float(degree_num)/float(degree_den)
    minute = float(minute_num)/float(minute_den)/60
    second = float(second_num)/float(second_den)/3600
    return degree + minute + second


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Display exif metadata of a image if available.')
    parser.add_argument('image_path', metavar='image_path', help='Complete image path.')

    args = parser.parse_args()
    if args.image_path:
        for key, value in get_exif_metadata(args.image_path).items():
            if key == 'GPSInfo':
                print convert_to_decimal(value['GPSLongitude'], value['GPSLatitude'])