EGS 2308: DIGITAL MAPPING Past Paper

W1-2-60-1-6
JOMO KENYATTA UNIVERSITY OF AGRICULTURE AND TECHNOLOGY
University Examinations 2016/2017
YEAR III SEMESTER II EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN GIS

EGS 2308: DIGITAL MAPPING

DATE: DECEMBER, 2016 TIME: 2 HOURS

INSTRUCTIONS: Answer Question ONE and Any Other TWO Questions.

Question One – 30 Marks

a) Differentiate between systematic and adhoc data collectors. [4 marks]

b) Explain five advantages of conducting field survey as opposed to aerial chorography as a method of data collection in digital mapping. [6 marks]

c) What steps should be taken to minimize errors while scanning and digitizing? [5 marks]

d) Explain the five purposes of digital mapping. [5 marks]

e) Explain any five sources of discrepancies or errors in spatial data. [5 marks]

f) List and explain the common forms of reliefs depiction. [5 marks]

Question Two – 20 Marks

a) List five sets of data you would use in a mapping exercise for land use planning. Explain the role that each data set will play. [10 marks]

b) You have given several data sets for digital mapping exercise. Explain how you will select suitable data set for your exercise. [10 marks]

Question Three – 20 Marks

a) Discuss the cross slide digitizer. [5 marks]

b) Explain the criteria used in selection of characteristic points in an image. [10 marks]

c) Discuss the errors associated with digitizing maps. [5 marks]

Question Four – 20 Marks

a) Explain the concept of Geo referencing highlighting the three main processes involved. [8 marks]

b) Explain the method via which raster to vectors conversion can be implemented. [6 marks]

c) Give three advantages and disadvantages of raster data models. [6 marks]

Question Five – 20 Marks

a) Explain the aspects that would enable you extract information from an image. [10 marks]

b) Discuss the use of DTMS in a crop suitability and industrial site selection. [5 marks]

c) What is the relevance of meta data? And what does it encompass? [3 marks]

d) Outline two advantages of a TIN as compared to a grid DTM. [2 marks]

(Visited 128 times, 1 visits today)
Share this:

Written by