When HN users recommended it
1 HN user recommended this in 2021, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
1 HN user recommended this in 2021, in one comment.
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
Really? I can't tell what accuracy a good theodolite gets, but this consumer device [1] claims 3/16ths of an inch at 30ft. Obviously that won't scale to 1km distance like they're doing in this, a professional one seems competitive with the quoted ~2cm accuracy.
[1] https://www.amazon.com/SKIL-Self-Leveling-Cross-Line-Laser/d...