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Abstract--A central role of Geographic Information Systems (GIS) is to allow the identification and visualisation of relevant
 

Summary: Abstract--A central role of Geographic Information Systems
(GIS) is to allow the identification and visualisation of relevant
spatial features from typically large volumes of data. This
requires a querying system to provide both flexibility and
usability. While standard GIS querying capabilities are often
either very limited, or require a user to have knowledge in
specialised areas, techniques in qualitative spatial reasoning
have been developed that provide a powerful and intuitive
method of representing and reasoning about spatial
information. In this paper we present a method for querying
about the qualitative distance between features using dynamic
networks such as roads, bus or ferry services, and flight paths,
rather than only using the Euclidean distance. Linguistic
values are used to implement qualitative distances for the
linguistic variable proximity. TreeSap GIS with qualitative
querying support is presented to demonstrate how qualitative
distance measures through a network can provide both a
computationally practical solution and a mechanism through
which non-experts benefit from powerful search tools.
I. INTRODUCTION

  

Source: Amor, Robert - Department of Computer Science, University of Auckland

 

Collections: Computer Technologies and Information Sciences