GEOG 892
Geospatial Applications of Unmanned Aerial Systems (UAS)

Common Error Estimation Terms

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Common Error Estimation Terms

Table 2 lists the most common terms used to estimate errors in surveying and mapping. Probable error is the term used to describe the probability, or the confidence level, that 50% of the errors fall within, while 95% errors represents the confidence level that 95% of the measured errors values fall under.

Table 2 Common error representations used in surveying and mapping
Error % Error Constant wrt σ
Probable Error 50 0.6745 σ
Standard Error 68.27 1.000 σ
90% Error 90 1.6449 σ
95% Error 95 1.9599 σ
3σ Error 99.73 3.0000 σ