Which practice best enhances reliability in surveying networks: maximizing cross-tie usage and repeated measurements, or minimizing them?

• A. Minimize cross-tie usage
• B. Ignore repeat measurements
• C. Maximize cross-tie usage and repeat measurements
• D. Limit cross-ties to save time

Answer: (C)

Reliability in surveying networks comes from redundancy and the ability to check for errors. Cross-ties provide alternative routes within the network, so measurements can be cross-checked against multiple paths. If a reading in one route doesn’t match the others, you can spot and correct the mistake, and the extra connections help prevent errors from propagating through the network. Repeating measurements adds statistical strength: random errors tend to average out, and those repeated values feed into a least-squares adjustment to give a more stable, accurate network solution. With more cross-ties and more repeated measurements, you get better error detection and precision, making the network more dependable. Limiting cross-ties or skipping repeats reduces this ability to detect mistakes and reduce random error, lowering reliability.