Explain the term ‘Metadata’ as related to a GIS.
Explain the term ‘Metadata’ as related to a GIS.
Discuss why this is becoming an important part of most GIS and what problems you are likely to face if you had to work on a GIS developed by someone else but there was no metadata attached to it
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Question 2
“Whether a feature is represented as a point or a polygon in a GIS data base is entirely dependent on the nature of the phenomena itself.”
Do you agree with this statement? Explain
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Question 3
Review the issues involved in selecting a resolution for a raster GIS project. What resolutions would be appropriate for the following problems: (a) determining logging areas in a National Forest, (b) finding suitable locations for backcountry campsites, (c) planning a national highway from Melbourne to Darwin?
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Question 4
Write an essay discussing the raster and vector data models. In your
discussion include issues such as: the strengths and weaknesses of the two models, the costs of setting up the two data models, common sources of data for the 2 models,different scenarios in which one model would be preferred over the other, and why most spatial datasets have data in both formats. Give examples where possible.
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Question 5
Write a detailed essay on “ Datums and Map Projections ”. In your discussion, include issues such as:
1- The importance of datums and map projections
2- Some common map projections in current use
3-The map projections used in Australia
4- A time line of map projection changes in Australia
5- Why all data layers within a GIS analysis need to be in the same map
projection.
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