Elements Of Remote Sensing
The arrangement of terrain features which provides attributes: the shape, size and texture of objects, is called:

Temporal variation
None of these
Spectral variation
Spatial variation

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Elements Of Remote Sensing
Which one of the following residual biases involves the GPS accuracy?

All listed here
Satellite dependent biases due to uncertainty in the orbital parameters of the satellite
Signal propagation biases due to the sphere and troposphere propagation
Receiver-dependent biases due to clock stability with line

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