Image::ExifTool::Geotag(3) Geotagging utility routines


This module is used by Image::ExifTool


This module loads GPS track logs, interpolates to determine position based on time, and sets new GPS values for geotagging images. Currently supported formats are GPX, NMEA RMC/GGA/GLL, KML, IGC, Garmin XML and TCX, Magellan PMGNTRK, Honeywell PTNTHPR, Winplus Beacon text, and Bramor gEO log files.

Methods in this module should not be called directly. Instead, the Geotag feature is accessed by writing the values of the ExifTool Geotag, Geosync and Geotime tags (see the Extra Tags in the tag name documentation).


To take advantage of attitude information in the PTNTHPR NMEA sentence, two user-defined tags, GPSPitch and GPSRoll, must be active.


Copyright 2003-2016, Phil Harvey (phil at

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.


Thanks to Lionel Genet for the ability to read IGC format track logs.