Istituto di Scienza e Tecnologie dell'Informazione     
Paterṇ F., Campari I., Scopigno R. The design and specification of a visual language: an example for customising geographic information systems functionalities. In: Computer Graphics Forum, vol. 13 (4) pp. 199 - 210. Wiley, 1994.
In this paper the design of a visual program editor and its specification using formal grammars are discussed. We consider an environment to specify, analyse and execute visual programs for a Geographical Information System (GIS). The lack of sophisticated user interfaces is one of the major drawbacks to Geographical Information Systems, particularly for people without a sound background in computer science. The use of a visual language approach is useful in order to hide the plethora of basic GIS functions, while providing ready- to-use tools to solve users' tasks. The visual environment provides users with higher level interfaces; it is based on the module concept, which is conceived as a software building block that implements a solution to a general basic task and is presented to the user through an interactive frame. Complex GIS queries can be carried out by interconnecting modules into flow networks, using a direct manipulation approach.
URL: http://onlinelibrary.wiley.com/doi/10.1111/1467-8659.1340199/abstract
DOI: 10.1111/1467-8659.1340199
Subject User interfaces
Visual Language
H.5 Information Interfaces and Presentation

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