DOI: 10.5593/sgem2012/s11.v3012


Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 3, 433 - 440 pp


Geographic information systems are used by geographers, engineers, surveyors, clerks
that are not familiar with text programming. Visual programming brings to these users
the opportunity to construct the batch data processing program in a graphical way.
GIS software is frequently supplemented by components for visual programming. These
components are aimed mainly for easy programming of the data batch processing.
Advantage is storing the program of batch processing for the repetitive running on
various spatial data sets. Furthermore, exchanging program between users is valuable.
From my perspective as a teacher I am most interested in the question how novices
learn to program. Visual programming is a fresh start point for a novice programmer.
Visual program is more comprehensible than textual programming. Evaluation of
possibilities of the component ModelBuilder in ArcGIS software is mentioned. Model
Builder produce program called “model” than can be converted to Python scripting
language. This moment changes common users to programmers. Comparison of the
same graphic version of model with converted textual Python script helps to understand
commands. Novice programmer learn how call the geoprocessor module, check
licensees of extensions, how to set input parameters and how call tolls from Arc
Toolbox. Visual programming is easy in ModelBuilder. Subsequently, users are able to
comprehend and write the Python scripts quickly.

Keywords: geoinformatics, visual programming, ModelBuilder, data flow, Python.

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