Elements Of Remote Sensing
Which one of the following parameters is accurate for DGPS?

Positional accuracies ~ 5 - 10 m if rover is less than 5-10 km from reference station
Positional accuracies ~ 5 - 10 m if rover is less than 25 km
Positional accuracies ~ 2 - 5 m if rover is less than 2-5 km from the reference station
Positional accuracies ~ 1 - 2 m if rover is less than 1-2 km from the reference station

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Elements Of Remote Sensing
Which one of the following statement is incorrect regarding the electromagnetic radiation?

The changing electric fields induce the changing magnetic fields in the surrounding medium
These are produced by the motion of electric charge
The oscillation of charged particles sets up changing electric fields
None of these

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Elements Of Remote Sensing
Pick up the correct definition from the following with response to GIS.

The area features which are wholly contained within another area feature, is known so containment
All of these
Common boundary between two areas of a locality is known as adjacency
The geometric property which describes the linkage between line features is defined as connectivity

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