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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.
Error | % Error | Constant wrt |
---|---|---|
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 |