Site list (GPS fixes) Walks (GPS tracks) Video clips
Electronic projects:
Bat detector
Lamp tests
µ-controlled lamp
SEPIC-based lamp
ISP isolators
Making SMT boards
Expedition logs:
1973,
1974, 1975,
1976, 1977, 1979,
1982, 1983, 1985,
1986, 1987, 1988,
1989, 2000, 2001,
2002, 2003, 2004,
2005, 2006, 2007,
2008, 2009, 2010,
2011, 2012, 2013,
2014, 2015, 2016,
2017, 2018, 2019
Mexico, New England
Translation:
GPS tracks
A list of walks (GPS tracks) on the Speleogroup site, sorted West→East. Click on the description to open or save the .gpx file, or on ‘GE’ to see the track on Google Earth (if you have Google Earth installed). Click on a coordinate (usually the start of the track) to see that coordinate on Google Maps.
The GPS coordinates shown are typically the starting point, and are in °,′,″ and UTM eastings and northings, using the European 1950 datum as used on most Spanish maps (including the 1:25,000 ‘blue series’). To get WGS-84 coordinates, subtract 4.1″ from N and add 4.8″ to W (an adjustment of ~160m). For more details on this and the grid systems used on the Spanish maps of the area, see Coordinate systems.