Fig. 3

Reproduced from Dolman and Reid (2014). Graphical representation of the quality control process for a point within its local neighborhood. Part a shows a maximum neighborhood (blue) of 24 points surrounding point x (purple). Part b shows the points which were deemed ‘good’ (green) and ‘bad’ (red). In c only the good points are used in a planar interpolation, to produce an interpolated value of point x (d). The original and interpolated values of point x are then used to determine whether x should be considered good or bad (e)