This chapter presents a programming-by-demonstration (PBD) approach to
geographic information systems (GISs). The aim of our approach is to en-
able nonspecialist users to avail themselves of the software without having
to resort to the help of expert users. We begin with a story of one group of
nonspecialist users who encountered difficulty with GIS software. Next we
summarize findings of a study of why GIS software is hard for nonspecialist
users to use. Then we describe in detail the PBD approach for GIS and ex-
plain how this component may be integrated into a GIS.
. I Introduction ...
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