5 Questions
Define precision and accuracy in the context of geomatics.
Precision refers to the closeness of repeated measurements to each other, while accuracy refers to the closeness of a measurement to the true value.
What is the main advantage of using GNSS for positioning?
Fast, simple, and georeferenced positioning in the global reference system (WGS84).
How can the error in Digital Terrain Model (DTM) values affect the output of a landslide hazard model?
The error in DTM values can change the results of the landslide hazard model, especially when adding random values to the elevation data and rerunning the model multiple times.
What method is used by a receiving antenna to derive the geographical position of a point in GNSS positioning?
Trilateration method.
What are the main cons of using GNSS for positioning?
Accessibility limitations, lower precision than a total station, and dependence on sky visibility.
Test your knowledge of precision, accuracy, tolerance, and nominal map scale in the context of urban and regional planning. Evaluate your ability to estimate the precision and accuracy of surveying data and consider the implications of errors in geomatics.
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