Define relative misclosure ratio

The relative misclosure (precision) ratio is the linear closing error of a traverse divided by the total length (perimeter) of the traverse, written as 1 in N:

$$\text{Relative misclosure} = \frac{\sqrt{(\Sigma L)^2 + (\Sigma D)^2}}{\text{Perimeter}} = \frac{1}{N}$$

where $\Sigma L$ and $\Sigma D$ are the sums of latitudes and departures. It measures the accuracy of the traverse; a larger N means a better survey.