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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