How to use the listerCompass

The listerCompass is fast, smart and designed for practical use by a structural geologist.

If you want to measure a surface, put your iPhone anywhere on it.
If you want to measure the surface, and a lineation on that surface,
orient the iPhone on the surface so that it is oriented with its long axis parallel to the lineation.

The best things about it [tested now by using it extensively under (dry) field conditions]

1) It can be used upside down under an overhang
2) A foliation and a lineation can be measured at the same time, simply by touching the screen
3) A simple double tap allows information to be recorded
4) Its flexible <XML> output allows data to be used by other programs such as iGeologist
5) The map view screen now allows placemarks to be added (and saved using KML <XML> which allows files to be dragged onto and used with Google Earth


1) strike is given as a single number such that the dip is to the right
2) dip is the inclination of the surface plane of the compass, no matter what direction the compass is pointed

3) rake is the (anticlockwise) angle of rotation that links the strike direction of the plane being measured, to a line on that plane. Rake is positive if the direction of rotation is anticlockwise from the strike.


1) yaw is the plunge direction, or trend, of the lineation
2) pitch, or plunge, is the inclination of the line to the horizontal
3) roll is the angle between the surface and a plane that includes the lineation, but strikes at right angles to it