Methodology based on: A.M. Agatza-Balodimou, Theory of Errors & Adjustments I, National Technical University of Athens, School of Rural, Surveying and Geoinformatics Engineering, Athens, 2009.

Standard Error Ellipse Calculation

Upload txt file containing the data:

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The txt data file should have the following structure (Please also check the example of DATA.txt):

    # Approximate Coordinates

    POINT x y

    point_name x-coordinate y-coordinate

    # Variance-Covariance

    point_name

    sigmax2 σx²_value
    sigmay2 σy²_value
    sigmaxy σxy_value