Affiliations: Management Information Systems, University of
Houston-Clear Lake, Texas, USA. E-mail: rob@cl.uh.edu
Abstract: Geographical Information Systems or GIS are becoming useful tools in
making strategic decisions in a variety of government and business activities
in areas such as housing, healthcare, land use, natural resources,
environmental monitoring, public health, transportation, retail, and routing.
This usefulness emanates from the capability of GIS to present a large amount
of data in a short period of time on a map, using a geographical coordinate
system. In most cases, spatial datasets required for GIS mapping are already
available free from many governmental agencies. GIS use more of computing
technology than geographical concepts, however, the capabilities of GIS
software did not reach the level of simplicity encountered in most software
used on a daily basis. Most organizations perform GIS analysis on their data
without getting involved with the mapping technology. A typical GIS analyst
faces various challenges while incorporating non-spatial dataset to spatial
dataset in order to present resulting dataset on a geographical map. In this
paper, we present some data manipulation complexities that are encountered
while using a GIS software to provide spatial twists to a large user dataset.
We also provide ways to facilitate the data manipulation process through a
practical example of asthma epidemiology. The solutions will be beneficial to
many GIS users in varieties of industries.
Keywords: GIS, geographical information systems, asthma, spatial data analysis