University of Twente Student Theses
The Dissemination, Retrieval and Visualization of Spatio-Temporal Statistical Data through National Statistical Websites
Alaba, Olukemi R. (2010) The Dissemination, Retrieval and Visualization of Spatio-Temporal Statistical Data through National Statistical Websites.
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| Abstract: | A National Statistical Office (NSO) is a governmental organization with the main objective of collecting and disseminating statistical and spatio-temporal statistical data for the country. Currently, more than ninety percent of the world’s NSO websites disseminate their spatio-temporal statistical data on the Web using tables, charts and static maps, thereby under-utilizing the functionalities offered by the Web for dissemination, retrieval and visualization of spatio-temporal data. The focus of this research was to contribute to the improvement of the dissemination, retrieval and visualization of spatio-temporal statistical data through national statistical websites from the users’ perspective. An investigation was carried out on all NSO websites to determine methods in which spatio-temporal statistical data are currently being disseminated, retrieved and visualized on these NSO websites and an inventory was developed. Applying a user centered design approach, a requirement analysis testing was also conducted to determine the users’ needs relating to the retrieval and visualization of spatiotemporal statistical data, and an improved prototype of a part of the Nigerian NSO website was developed. The prototype was developed based on the inventory and the output of the requirement analysis testing. The prototype was finally tested for effectiveness, efficiency and users satisfaction, from the users’ perspective. From the requirement analysis conducted, using think aloud, questionnaire and interview techniques, and the Nigerian and Swedish NSO websites as case studies, it was observed that the methods of dissemination, retrieval and visualization currently available on most NSO websites do not satisfy users’ needs. The prototype evaluation shows that animated and interactive maps are effective for the dissemination, retrieval and visualization of spatio-temporal statistical data, and that the use of the proper cartographic variables on maps are also important for the proper dissemination of spatiotemporal data from users’ perspective. Keywords Dissemination, retrieval, visualization, animated proportional symbol map, interactive choropleth map, national statistical websites and spatio-temporal. |
| Item Type: | Essay (Master) |
| Faculty: | ITC: Faculty of Geo-information Science and Earth Observation |
| Programme: | Geoinformation Science and Earth Observation MSc (75014) |
| Link to this item: | https://purl.utwente.nl/essays/92414 |
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