This is a free service that lets you automatically geotag photos that you have already uploaded to Flickr, by simply uploading a log file from your GPS logger.
Supported file formats: GPX, NMEA (Sony GPS-CS1, etc.)
To proceed, you must first click the button below to proceed allowing service to get "write" access to your Flickr photos. This will be used only to search your photos that match your log, and then to geotag your photos on Flickr (only after you have previewed the result on a map).
For usage monitoring purposes, this free service keeps a log of your IP address, date and time of usage, log format, and the number of geolocations and photos processed. Your geolocation data, photos, Flickr account name or other personally identifiable data is NOT retained.