Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Get Latitude and Longitude from EXIF using PIL
from PIL import Image
from PIL.ExifTags import TAGS, GPSTAGS
def get_exif_data(image):
"""Returns a dictionary from the exif data of an PIL Image item. Also converts the GPS Tags"""
exif_data = {}
info = image._getexif()
if info:
for tag, value in info.items():
decoded = TAGS.get(tag, tag)
if decoded == "GPSInfo":
gps_data = {}
for t in value:
sub_decoded = GPSTAGS.get(t, t)
gps_data[sub_decoded] = value[t]
exif_data[decoded] = gps_data
else:
exif_data[decoded] = value
return exif_data
def _get_if_exist(data, key):
if key in data:
return data[key]
return None
def _convert_to_degress(value):
"""Helper function to convert the GPS coordinates stored in the EXIF to degress in float format"""
d0 = value[0][0]
d1 = value[0][1]
d = float(d0) / float(d1)
m0 = value[1][0]
m1 = value[1][1]
m = float(m0) / float(m1)
s0 = value[2][0]
s1 = value[2][1]
s = float(s0) / float(s1)
return d + (m / 60.0) + (s / 3600.0)
def get_lat_lon(exif_data):
"""Returns the latitude and longitude, if available, from the provided exif_data (obtained through get_exif_data above)"""
lat = None
lon = None
if "GPSInfo" in exif_data:
gps_info = exif_data["GPSInfo"]
gps_latitude = _get_if_exist(gps_info, "GPSLatitude")
gps_latitude_ref = _get_if_exist(gps_info, 'GPSLatitudeRef')
gps_longitude = _get_if_exist(gps_info, 'GPSLongitude')
gps_longitude_ref = _get_if_exist(gps_info, 'GPSLongitudeRef')
if gps_latitude and gps_latitude_ref and gps_longitude and gps_longitude_ref:
lat = _convert_to_degress(gps_latitude)
if gps_latitude_ref != "N":
lat = 0 - lat
lon = _convert_to_degress(gps_longitude)
if gps_longitude_ref != "E":
lon = 0 - lon
return lat, lon
################
# Example ######
################
if __name__ == "__main__":
image = ... # load an image through PIL's Image object
exif_data = get_exif_data(image)
print get_lat_lon(exif_data)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment