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    #accuracy

    All articles tagged “accuracy”.

    3 posts

    Survey Accuracy Standards Explained: What “±2 cm” Really Means
    ★ Pillar
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    Survey Accuracy Standards Explained: What “±2 cm” Really Means

    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.

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    Where GNSS-RTK Error Really Comes From — and the Field Habits That Shrink It
    Jun 6, 2026
    Insights

    Where GNSS-RTK Error Really Comes From — and the Field Habits That Shrink It

    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.

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    The Geoid Explained: Why Your GNSS Height Is Not the Height You Want
    Jun 6, 2026
    Insights

    The Geoid Explained: Why Your GNSS Height Is Not the Height You Want

    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.

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