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WorksheetsGIS Unit III
Total questions: 15
Worksheet time: 10mins
What is the data stream?
The process by which maps are transferred between GIS platforms.
The flow of data from producer to GIS.
The process by which raw spatial data is processed into an integrated GIS database.
The flow of data from one user to another.
Keyboard entry is no longer used in GIS projects.
True
False
In point mode digitising points are added automatically at set time or distance intervals as the user moves the cursor across the map.
True
False
A pseudonode is a node which can be removed from a vector dataset without affecting the topology.
True
False
The node (2) in the above topology can be called as
Pseudo node
Arc node
Dangle node
Polygon node
What topology rule can be applied for removing the errors (Red colored region).
Must not have gaps
Boundary must be covered by
Contains point
Must not overlap
What rule can be applied to remove the error in the above spatial data?
Must not overlap
Must not have gaps
Must not overlap with
Must be covered by
What rule can be applied to remove the errors in the above spatial data?
Point must be covered by line
Point must be covered by boundary of
Must be coincident with
Point must be coincident
What rule can be applied to remove the error in the above spatial data?
Must not overlap
Must not self overlap
Must not intersect
Must not self intersect
What rule can be applied for removing the errors in the above spatial data?
Must be covered by
Must cover each other
Must not overlap
Must not overlap with
Global Positioning Service (GPS) uses 24 satellites in
8 orbits
7orbits
6 orbits
5 orbits
How long does it take a GPS satellite to orbit the earth?
4 Hours
8 Hours
12 Hours
24 Hours
Airplane and boat pilots use GPS for
mapping
limit setting in air or water
navigation
bearing
(i) GPS Surveying can be carried out without clear line of sight between stations;
(ii) GPS Surveying can be carried out at night;
(iii) GPS Surveying can be carried out underground;
(iv) GPS Surveying can be carried out in poor weather conditions.
Of these correct statements are:
(i), (ii), (iii)
(ii), (iii), (iv)
(i), (ii), (iv)
None of the above
A GPS receiver determines its location by:
(i) Receiving information from a satellite on its location and what time the signal was sent;
(ii) Comparing the difference in time between when the signal was sent from a satellite and when it was received by the receiver;
(iii) Using that number, and the speed of light, to calculate how far away the satellite must be;
(iv) Using this information from several satellites to pinpoint the exact location;
Whether all the above statements are
True
False
