1 :: What are the three main types of data error?
1. Errors created by faulty processing.2. Errors created by human error.
3. Errors from obvious sources (e.g. incomplete maps)
4. Errors created during data input (e.g. digitizing).
5. Errors created by map projection.
Errors from obvious sources (e.g. incomplete maps)
Errors created during data input (e.g. digitizing).
Errors created by faulty processing.
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2 :: What are the common problems faced when obtaining data from secondary sources?
1. Expense2. Availability of suitable data
3. Unknown data formats
4. Unknown lineage
Availability of suitable data
Unknown lineage
Expense
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3 :: Practical problems faced when scanning map documents include:
1. Selection of appropriate tolerances2. Lack of suitable raster to vector conversion software
3. Possibility of optical distortion
4. Inclusion of unwanted information
Inclusion of unwanted information
Selection of appropriate tolerances
Possibility of optical distortion
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4 :: Which of the following can be a problem in manual digitizing?
1. Dimensional stability of source documents2. Hand-eye coordination
3. Availability of suitable hardware and software
4. Boredom
5. Inaccuracies in document registration
Inaccuracies in document registration
Dimensional stability of source documents
Boredom
Hand-eye coordination
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5 :: Which of the following methods may be used to input paper maps into a GIS?
1. Scanning2. Automatic digitizing
3. Manual digitizing
4. Keyboard entry
5. Tracing
Scanning
Automatic digitizing
Manual digitizing
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