Andreas Blaser and
Max Egenhofer AVI2000--Advanced Visual Databases, Salerno, Italy,
V. Di Gesù, S. Levialdi, and L. Tarantini (eds.), pp. 211-216, May 2000.
Abstract
To support users in querying geographic databases we have developed
a system that lets people sketch what they are looking for. It
closes the gap between user and information system because the
translation of a userÕs question into a processable query
statement is delegated to the information system so that a user can
focus on the actual query rather than spending time with its
formulation. This system paper highlights a set of interaction
methods and sketch interpretation algorithms that are necessary for
pen-based querying of geographic information systems. They are part
of a comprehensive prototype implementation of
Spatial-Query-by-Sketch, which provides feature-based and
relation-based spatial similarity retrieval.
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Andreas Blaser and
Max Egenhofer