Disadvantages Requires training and retraining as technology changes. Urban canyon buildings can block satellite signals. Multi-path reflective signals can make data inaccurate. Requires careful attention to system configuration and data collection standards and procedures. The Future External sensing devices will augment GPS data collection.
Laser guns attached to a GPS receiver can do offsets to hard to reach features.
A three-dimensional GPS position with attached features and attributes is provided. The laser gun reduces data collection costs and speeds data gathering. For example, a laser shot can be made to a manhole cover in a heavy traffic intersection without occupation. From one convenient location, nearby utility poles can be quickly captured with multiple shots. Features on private property can be shot without violating property boundaries.