Question

Explain any two features of Mapping Grade DGPS.

Hint:

Mapping Grade DGPS balances cost, ease of use, and decent accuracy.

Answer 1

Mapping Grade DGPS (Differential GPS) is commonly used for mapping and resource surveys where sub-meter accuracy is sufficient.
One important feature is differential correction.
Mapping Grade DGPS uses correction signals from a base station to reduce position errors caused by satellite clock drift and atmospheric conditions, providing typical accuracies of 0.5–5 meters.
Another feature is real-time data collection capability.
These units can display corrected position data instantly in the field, which helps surveyors collect accurate coordinates for mapping without post-processing.
Mapping Grade DGPS is widely used in forestry, agriculture, utility mapping, and other applications that require reasonable spatial precision at lower costs.