How do accuracy standards differ between boundary, topo and construction work?

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Standards and ALTA surveys0 answersAI answer

Clients ask what accuracy we guarantee. How should we state it?

Asked October 25, 2026

AI answer · not yet verified by a surveyor

Accuracy needs differ by purpose, so state them by product [1]:

  • Boundary surveys: usually governed by state minimum standards or ALTA relative positional precision, often written as a tolerance plus a part-per-million value.
  • Topographic surveys: stated as horizontal and vertical accuracy for hard surfaces and for ground shots, sometimes tied to the contour interval or ASPRS map standards.
  • Construction staking: tolerances are set by the project specifications or the engineer, often tighter for structures than for earthwork [2].

Good practice:

  • Write the accuracy standard and method into the proposal and onto the deliverable.
  • Use checkpoints to verify, not just to estimate.
  • Separate accuracy (closeness to truth) from precision (repeatability) when explaining to clients.

Sources

  1. What is a topographic survey and how is it created?
  2. What Is Construction Staking and Why Is It Important?

General information only. Answers here are not a survey or legal advice, and no one here can tell you where your boundary is. For your property, hire a licensed land surveyor in your state; for legal questions, a real-estate attorney.

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