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May 24, 2026

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Ten Arc-Seconds If I Learn Which Line Aligns

Precision Surveying Theodolite Operation

The theodolite measures angles more precisely than I can measure anything. The limitation is me, not the 61-year-old Swiss brass.

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Closing the Loop on Floating-Point Error

Kahan Compensated Summation 🔗 Precision Surveying Theodolite Operation

Like theodolite traverses that must close, floating-point sums accumulate error that Kahan summation tracks and corrects.

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🎮 Arc Second Align a theodolite crosshair with targets under time pressure. Precision escalates from ±30" to ±5" arc-seconds.