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6. Which one is the incorrect statement about automated digitizing?

  • A great deal of cleaning is involved
  • It is raster based
  • The algorithm has no concept of context of the info being digitized
  • Uses automatic line tracing so is very quicker
  • It is dependent on the quality of the algorithim
  • Features less than the resolution of data set will be lost

7. Which statement is incorrect about the simply proximity analysis of buffers?

  • Waldo Toblers law of geography supports it 'near things are more related to each other'
  • Questions of proximity can be continuous and these require complex interpolation
  • Calculate proximity of entities
  • Questions of proximity can be ranked and can be analysed through buffer extraction
  • Questions of proximity can be discrete and can be analysed through buffer analysis

8. What is the relationship between the geoid and the ellipsoid?

  • Geoid includes smoothes topography on the top of an ellipsoid
  • Earth is made up of a smooth geoid and an elevated ellipsoid
  • Geoid includes the rough surface of the sphere of the geoid
  • The ellipsoid comprises the smoothed area of the geoid earth

9. What is unusual about primary and secondary data?

  • Spatial and attribute data do not have to be one ind of data, one can be secondary whilst the other can be primary
  • Spatial and attribute data have to always be secondary data
  • Spatial and attribute data have be the same type of data
  • Spatial and attribute data have to always be primary data

10. Which one is the incorrect statement about scanning?

  • Resolution is an important component
  • The raster data will then need registering to provide a spatial reference across the grid
  • Optical distortion is possible
  • It is a manual digitization technique
  • It outputs raster and is then converted to vector

11. Which statement is incorrect about stream mode digitizing?

  • Digitizer slows around complex lines so more points are added at these ocations
  • A point is made at each change in direction
  • Computer algorithms optimise digitization by placing points at set intervals

12. How do you measure distance?

  • Distance= time + velocity
  • Distance= velocity x time
  • Distance= time - velocity
  • Distance= velocity/time

13. What does the arc node structure not do?

  • Tables relate to the nodes of arcs and the arcs coordination
  • There is no duplication of data and spatial relationships can be determined by interrogating the data tables
  • Nodes occur at any intersections of lines
  • Treats each entity as unique and shows coordinates of each in a table
  • Allows encoding of topology and shape

14. What is not a characteristic of the 4th satellite principle?

  • The 4th satellite changes the ground station time to an atomic clock
  • It adjusts the receiver clock until unique solution is reached, it must be correct to create an atomic clock
  • There is an inability to range a unique solution for the receiver to indicate that there is an error
  • Error is the same in all satellite ranges
  • One of the points is usually rejected as being too far away or moving an impossible velocity

15. What is the speed of light and what travels at it?

  • 200,000 m/sec and solar waves
  • 186,000 m/sec and radio waves
  • 150,000 m/sec and radioactive waves
  • 185,000 m/sec and infrared waves

16. What is not a characteristic of a rectangular coordinate system?

  • The lines are regular and even across the grid
  • Uses longtiude and latitude references
  • Cartesian grid placed over the earths surface
  • The difference between the grid space and the geographical space varies on the size of area it is placed over
  • Only used on small areas, an example being the BNS being placed over the UK

17. Which is not a method of projection of 3D earth to a 2D plane?

  • Longitudinal and latitudinal
  • Planar
  • Cylindrical
  • Conic

18. What statement is incorrect about the issues of stream mode digitizing?

  • Positional accuracy
  • Too many points district true line identity
  • Shaky hands
  • Greater areas of sinuous signs
  • Occasional digitizers

19. What are the two integration methods of vector data?

  • Just unions
  • Buffers and intersects
  • Union and intersects
  • Unions and buffers

20. What is the incorrect feature of LIDAR?

  • Light transmitted from a scanner to a target
  • Uses heat waves (thermo detection)
  • Uses light waves
  • Time is takes for light to travel back to target and back provide a range