experiment (in progress)

 
Here are "trigger" images, being coded trees on the hillside behind Hardie, starting with lower trees (in vicinity of dumpster), and moving up to the right, and then left descending along the chainlink fence.

This is an experiment, and is not fully functioning at present.

afterthoughts —

believe that the bark patterns themselves may be sufficient, to differentiate 10-12 triggers. If so — will test — could get by with only a single blue dot (just to indicate center of a trigger area); alternatively, could use circular-shaped metal labels (with hole for pin or nail), as suggested by Chelsea, or some other more permanent/dependable mark that is immune to weather.

Thinking, for example, of numbered nails (nails with figures on them) —
date nails
letter nails

John McVey at aurasma : asfaltics
 

01

02

03

04

aside
I've removed images 5-11, because I've not yet created "auras" for them. One of my primary texts is Thomas A. Clark, his In Praise of Walking. Text (marred by some typos) here.