LM-GPS Exam 2 - Review

What is the formula for calculating the Correction Factor (CF)?

• Total Correction (ft) / Total Distance (ft)

• Total Distance (ft) / Total Correction (ft)

• Total Correction (ft) * Total Distance (ft)

• Total Distance (ft) * Total Correction (ft)

How do you determine the line offset for boundary line correction?

• Flag Distance (x chains) * calculated CF

• Flag Distance (x chains) / calculated CF

• Flag Distance (x chains) + calculated CF

• Flag Distance (x chains) - calculated CF

What is the purpose of differential GPS?

• To remove errors in GPS satellite signals

• To improve the accuracy of GPS locations

• To correct for multipath issues

• To provide real-time corrections

What are the two types of differential GPS?

• Real-time and Post-processing

• WAAS and RTK

• Base station and Rover

• Satellite and Atmospheric

Where does WAAS work?

• North America

• Europe

• Asia

• South America

What gives the best results in terms of GPS accuracy?

• Post-processing with DGPS

• Real-time differential GPS

• WAAS GPS systems

• Multipath calculations

What errors are corrected with post-processing differential correction?

• Satellite and atmospheric errors

• Satellite orbit issues and clock drift

• Multipath issues

• Ionospheric signal delays

What steps are involved in clearing waypoints and track history?

• Main menu -> Track Manager -> Current Track -> Clear current

• Setup tracks -> Track Log -> Record -> Show on Map -> Auto record

• Find -> Waypoints -> Menu -> Delete All -> Yes

• Plug-in -> File -> File properties -> Projection (match projection)

How do you transfer data with DNRGPS?

• Waypoint -> Download

• File -> Save to -> File -> Save both .txt and .shp

• Point to line -> Feature to Polygon

• Right click -> 7-zip

What elements should be included in a cartographically correct map?

• Title, Labels, Legend, North arrow, date, name, source, scale bar (km/mi), neat line, map body

• Total Correction (ft) / Total Distance (ft)

• Base station and Rover

• Post-processing with DGPS