Key points are not available for this paper at this time.
Susan Elshaw Thrall, PhD,is Professor, Department of Computer Science, Business Division, at Lake City Community College in Lake City, Florida, and Vice President of Spatial Decisions and Analysis, Inc., a GIS consulting firm in Gainesville, Florida. She is also an independent GIS technology reviewer and commentator. Use of trade names and commercial sources is For identification only and does not imply endorsement by the Public Health Service or by the U.S. Department of Health and Human Services. Opinions expressed by Dr. Susan E. Thrall are hers alone. Dr. Susan E. Thrall prepared this review in February 1998. Technology products are continually changing. Most have a less than an 18-month life cycle. In the interim between preparation of this article and time of publication, many of the products reviewed in this article may have been superseded by more recent versions.
Susan Elshaw Thrall (1999) studied this question.