Correct
assessment of construction safety requires reliable information about
geometrical shape of the analyzed
object. The least square method is the most
popular method to calculate object deviation between theoretical geometry and
the real object shape measured with geodetic methods. The paper presents the
possibility of using robust
estimation methods on the example of Hampel method.
Deviation values obtained in this way are resistant to outliers influence and
are more
reliable. This problem is illustrated by a hyperbola which is fitted
in survey points localized on the generating line of the cooling tower shell in
one of its axial vertical cross-section.