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Geographic Information Systems Question Paper

Geographic Information Systems

Course:Bachelor Of Science In Information Technology

Institution: Kca University question papers

Exam Year:2009

UNIVERSITY EXAMINATIONS: 2008/2009
SECOND YEAR EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE IN INFORMATION TECHNOLOGY
BIT 2307: GEOGRAPHIC INFORMATION SYSTEMS
DATE: AUGUST 2009 TIME: 2 HOURS
INSTRUCTIONS: Answer question ONE and any other TWO questions
QUESTION ONE (30 MARKS)
a) Explain the meaning of the following terms with reference to GIS;
i) Attribute data (2Marks)
ii) Spatial data (2Marks)
iii) Remote sensing (2Marks)
b) i) Define the term ‘projection’ (2Marks)
ii) With examples, identify the two types of queries performed on GIS attribute data (6Marks)
c) i) Discuss three benefits of storing spatial data in a database (6Marks)
ii) Discuss four types of time used to model the fourth dimension (4Marks)
d) Identify the major components of a typical GIS (6Marks)
QUESTION TWO (20 MARKS)
a) i) Discuss two vector data structures and state the use of each (4Marks)
ii) Discuss the ways in which vector data can be acquired (4Marks)
b) i) Highlight any three surface models (6Marks)
ii) Identify three classic network-type problems in network analysis (6Marks)
2
QUESTION THREE (20 MARKS)
a) Describe the following types of raster compaction techniques and how they can be applied to
the image below;
i) Run-length encoding (4Marks)
ii) Quadtrees (4Marks)
iii) Chain coding (4Marks)
b) i) Discuss any two features used to describe topology (4Marks)
ii) Identify the basic spatial entities that may represent features on a map (4Marks)
QUESTION FOUR (20 MARKS)
a) Discuss the following types of spatial data collection technologies
i)LIDAR (2Marks)
ii) GPS (2Marks)
iii) Digital Photogrammetry (2Marks)
b) i) Discuss the benefits of using digital map data for operational and strategic applications
(6Marks)
ii) Critically evaluate the issues considered when creating topographic maps (8Marks)
QUESTION FIVE (20 MARKS)
a) Distinguish between thematic and topographic maps and give an illustration of each (4Marks)
b) Discuss how the following spatial entities are represented with vector data
i) Point (2Marks)
ii) Line (2Marks)
iii) Area/polygon (2Marks)
c) i) Discuss the methods used to evaluate errors during the encoding of attribute data (6Marks)
ii) Using examples, discuss four types of temporal (time) events in GIS (4Marks)

Geographic Information Systems Question Paper

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