Add GPS data to images from ship GPS data by time matching

geotag.py

"""
Add GPS data to JPG pictures based on the ship.json folder.
"""

import exifread
from gpsexif import setGPS
from os import listdir
from os.path import isfile, join
import json
from datetime import datetime, timedelta

with open("ship.json") as json_data:
    data = json.load(json_data)
images_folder = "images/"

onlyfiles = [f for f in listdir(images_folder) if isfile(join(images_folder, f))]

# Modify  the exif in a file
for file in onlyfiles:
    if file.split(".")[-1].lower() != "jpg" and file.split(".")[-1].lower() != "jpeg":
        continue

    with open(images_folder + file, 'rb') as fh:
        tags = exifread.process_file(fh)
        photo_time = tags["EXIF DateTimeOriginal"]
        photo_time = datetime.strptime(str(photo_time), "%Y:%m:%d %H:%M:%S")

        if photo_time.second >= 30:
            photo_time = photo_time.replace(second=0)

            if photo_time.minute == 59:
                photo_time = photo_time.replace(hour=photo_time.hour+1)
                photo_time = photo_time.replace(minute=0)
            else:
                photo_time = photo_time.replace(minute=photo_time.minute+1)
        else:
            photo_time = photo_time.replace(second=0)

        for ship_data in data["features"]:
            ship_data = ship_data["properties"]
            ship_time = ship_data["date"]

            ship_time = datetime.strptime(ship_time, "%Y-%m-%dT%H:%M:%SZ")
            
            # Make ship time local norway, from UTC (+2h)
            ship_time += timedelta(hours=2)

            if ship_time == photo_time:
                setGPS(images_folder + file, [ship_data["longitude"], ship_data["latitude"]])
                break

You will need to install exifread and gpsexif. Then you will need to modify writer.py from gpsexif as shown here: geoyee/GPS-EXIF#1.

Place this script in a folder which also contains ship.json and a folder called images containing all the images you wish to geotag.

This script does not handle time zones, and assumes that ship.json is in UTC, and image time is in local Norwegian time.