The Problems of Web Accessibility

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  • Topic: Web accessibility, Usability, Geographic information system
  • Pages : 64 (21573 words )
  • Download(s) : 145
  • Published : December 7, 2010
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ABSTRACT

Increased interaction of elderly and disabled people with web content after the setting up of World Wide Web (WWW) has created problems such as Web Accessibility. With the increase in users of Geographical Information System (GIS), it also started facing the problem of web accessibility issues. The users started interacting with the maps extensively in the recent years which ultimately intensified the web accessibility problems in GIS applications. User interaction & content evaluation are helpful in identifying the web accessibility difficulties faced by GIS application users. Web accessibility problems can’t be identified by automated tools or guidelines but users are involved for that purpose. To identify the accessibility problems of users at initial stages, User Centred Approach is used in which users are included in the development process. With the help of user interaction evaluation and content evaluation the author attempts to identify the accessibility issues in GIS applications in this research project. A case study of web based GIS application called MapQuest is undertaken to discover the web accessibility issues pertaining in GIS applications. Another web based GIS application called Google Maps along with MapQuest was evaluated for identifying usability issues. The usability evaluation of aforementioned two GIS application were conducted using special criterion. Different research methodologies such as usability tests, questionnaires etc were carried out on users from different backgrounds. The report concludes with recommending UCD approach especially in development process through which the web based GIS application’s accessibility can be improved and enhanced. This research project also suggests ways to improve the usability of GIS applications on the basis of studies conducted.

TABLE OF CONTENTS

ABSTRACTi
TABLE OF CONTENTSii
CHAPTER 1 INTRODUCTION1
1.1 Problem statement:1
1.2 Aims:2
1.3 Objectives:2
1.4 Resources:3
1.5 Risk:3
CHAPTER 2 LITERATURE REVIEW4
2.1 What is GIS?4
2.2 Potential of GIS4
2.3 Role of GIS/ Web based GIS5
2.4 Web Accessibility7
2.5 Importance of Web Accessibility8
2.6 Web Accessibility Guidelines8
2.7 Web Accessibility Evaluation9
2.8 What is User Centred Design (UCD)10
2.9 Advantages and disadvantages of UCD13
2.10 Elements of UCD13
2.11 UCD and Web based GIS14
2.12 Usability definitions and its role15
CHAPTER 3 RESEARCH METHODOLOGY19
3.1 Research Process19
3.2 Literature Review20
3.3 Experiment21
3.4 Questionnaires22
3.5 Interviews23
3.6 Case study23
CHAPTER 4 EMPIRICAL STUDY25
4.1 Planning for Web Accessibility Test25
4.2 Dichotomous method Vs Continuous numerical measurement method25
4.3 Web Accessibility Guidelines26
4.4 The need for automatic evaluation27
4.5 Properties of Good Web Accessibility Metric27
4.6 Web Accessibility Barrier (WAB)28
4. 7 Construction of plan to evaluate the Web Accessibility of GIS Website - MapQuest29
4.8 Google Maps & MapQuest usability testing35
4.9 Questionnaire36
CHAPTER 5 RESULTS / ANALYSIS37
5.1 First Evaluation- Standard Review Method:37
5.2 WAB Score of MapQuest:42
5.3 Second Evaluation - Goal Question Metric Method (GQM)44
5.4 Over All response of Questionnaire44
5.5 Role of UCD (User Centred Design) in Accessibility47
5.5.1 Interview Results48
5.6 Section 249
5.6.1 Results achieved from usability tests:49
5.6.2 List of observation from usability tests51
5.6.3 Results from the questionnaires51
5.6.4 Comparison of Google & MapQuest53
CHAPTER 6 DISCUSSION/ANALYSIS AND VALIDITY STATEMENTS55
SECTION I55
6.1 Discussion55
6.1.1 Perceivable56
6.1.2 Operable57
6.1.3 Understandable57
6.1.4 Robust58
6.2 User Centred Design and Accessibility58
6.2.1 User Centred Design59
6.2.2 User Centred Design and Accessibility Problems59
6.3 Validity Statement60
6.3.1...
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