Instructions

Groundwindow shows augmented reality view of cave underground projected on a phone according to your GPS and phone orientation. The orientation to the north depends on gyros and needs to be set by hand using the control ($) below. Looking vertically down shows you two green triangles at your feet pointing north. When you walk with the device, a line points from the tip in the direction of motion.

Hop Hop camera (also can be done by bouncing phone upwards)

Cen Shift GPS location to the cave, or back to reality

Mag Try to get the magnetic orientation correct

See Show the back camera image

Lab Turn off or on labels

Top Reorient view to see from above

Drg Mode for dragging virtual foot position

Psg Hide LRUD-based passages

Bak Return to front screen to choose cave

? This help page V4

($) Touch then drag right to spin the north orientation

Touch then drag up or down to change lighting distance

Two finger touch then pinch to change field of view

Touch and hold for one second to select a cave section or entrance