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Trig Spiders from Mars

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Post by drsim » Wed, Aug 06, 2025, 6:39 AM UTC

Re: Trig Spiders from Mars

Post by lhmiles » Wed, Aug 06, 2025, 7:51 AM UTC

What are the dots?

Post by drsim » Wed, Aug 06, 2025, 11:20 AM UTC

lhmiles wrote: post #2

What are the dots?

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