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 frequently employed for mapping and resource surveys needing sub-meter accuracy.
A key characteristic is differential correction.
This system leverages correction signals from a base station to minimize positional inaccuracies stemming from satellite clock variations and atmospheric interference, achieving typical accuracies between 0.5–5 meters.
Another notable aspect is real-time data collection.
These devices present corrected position data instantaneously in the field, enabling surveyors to acquire precise mapping coordinates without subsequent processing.
Mapping Grade DGPS finds extensive application in forestry, agriculture, utility mapping, and other fields requiring adequate spatial precision economically.