CONTENTS
of Compass Points 16
The journal of the BCRA Cave Surveying Group, June 1997
Editorial
SNIPPETS:
LETTERS
GPS12XL Review - Wookey
Review of Garmin's new GPS12XL unit, comparing it
with the previous GPS45.
How to Create Evenly Spaced Tick Marks in AutoCAD - Reno Lippold
It has always been difficult to get CAD software
to draw the tick-marks on the drop/pitch symbol. Here is how to
do it using AutoCAD.
Surveying Underwater Caves - John Cordingley
Describes the techniques of underwater surveying,
and considers the probably accuracy of such techniques, pointing
out that underwater surveys are not necessarily much worse than
above water surveys, especially in the vertical.
Cave Visualisation using VRML - Wookey & Mike McCombe
Some background on relevant computing developments,
and a roundup of various people's work in this area, with details
of the Tunnel application.