For a second-order, class II geodetic control network, minimum triangulation station spacing is at least?

For a second-order, class II geodetic control network, minimum triangulation station spacing is at least?

• A. 15.00 km
• B. 5.00 km
• C. 10.00 km
• D. 0.50 km

Answer: (B)

In triangulation networks, how far apart stations are is chosen to keep the geometry strong enough to meet the required accuracy while avoiding unnecessary cost. For a second-order, class II geodetic control network, the spacing must be large enough to prevent overly dense work but small enough to keep angular measurements from translating into large coordinate errors. The commonly accepted minimum is about 5 kilometers. This length keeps triangle sides short enough that typical instrument precision in angle observations doesn't push the network beyond its second-order tolerances, while still providing enough redundancy for a reliable adjustment. Placing stations much closer (like 0.5 km) would waste effort without meaningful gains in accuracy, whereas much larger spacings (10–15 km) could compromise the intended accuracy by allowing error accumulation to grow along longer lines.

In triangulation networks, how far apart stations are is chosen to keep the geometry strong enough to meet the required accuracy while avoiding unnecessary cost. For a second-order, class II geodetic control network, the spacing must be large enough to prevent overly dense work but small enough to keep angular measurements from translating into large coordinate errors. The commonly accepted minimum is about 5 kilometers. This length keeps triangle sides short enough that typical instrument precision in angle observations doesn't push the network beyond its second-order tolerances, while still providing enough redundancy for a reliable adjustment. Placing stations much closer (like 0.5 km) would waste effort without meaningful gains in accuracy, whereas much larger spacings (10–15 km) could compromise the intended accuracy by allowing error accumulation to grow along longer lines.