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Trig Spiders from Mars (opens in new tab)

(alasdairrae.github.io)

2 pointsdrsim10mo ago2 comments

2 comments

2 comments · 1 top-level

lhmiles10mo ago· 1 in thread

What are the dots?

drsimOP10mo ago

Physical triangulation stations (trig points) for surveying and mapping.

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