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All articles tagged “accuracy”.
4 posts
Every reliable survey starts with control. Here is how our field crews design a control network — choosing between RTK GNSS and total-station traverse, and budgeting error so deliverables hold to centimetre tolerances.
A practitioner’s guide to how survey accuracy is defined and proven — ISO 17123 instrument tests, ASPRS positional classes, FIG practice, and why a single “±2 cm” number on a quote tells you almost nothing without its confidence level, datum, and check-point evidence.
RTK gives you a fixed solution in seconds, but a green 'fixed' light does not mean the point is good. Here is where the millimetres leak — multipath, PDOP, baseline length, the atmosphere — and the field habits our crews use to hold tolerance.
A GNSS receiver hands you an ellipsoidal height — a number that means nothing to a drainage engineer. Here is how our crews turn that into a real orthometric height surveyors and water actually agree on, and why the geoid model and a benchmark tie sit between the two.
