Frank Hardisty at FOSS4G North America conference

GeoVISTA Assistant Director Frank Hardisty traveled to Minneapolis to attend the Free and Open Source Software for Geospatial (FOSS4G) North American conference this week. Frank presented his paper, "Visualizing Spatial, Temporal, and Social Graph Phenomena with the GeoViz Toolkit" on Thursday, and was co-author on a paper by Penn State World Campus MGIS student, Matthew Wechsler.

The abstracts are below.

Get More Out of Your Web Map Service with SLD
Matthew Wechsler and Frank Hardisty of Pennsylvania State University

The Styled Layer Descriptor provides is an XML based standard for Web Map Services (WMS) to symbolize geographic features. This session will explore how SLD Rules, Filters, and Booleans can be exploited to symbolize geographic features according to attribute data. As a demonstration of this approach, we will explore how maritime Digital Nautical Charts in the Vector Product Format (VPF) can be properly rendered and displayed using SLD in lieu of the VPF native rendering rules - GeoSym. The result of this session will be a better understanding of the power of SLD along with the ability to better use the vast amounts of data available to you via WMS.

Visualizing Spatial, Temporal, and Social Graph Phenomena with the GeoViz Toolkit
Frank Hardisty, Pennsylvania State University

Being able to interactively visualize the torrents of new data, like those provided by social networks is a challenge developers of open source geospatial software are grappling with. I report here on my experiments using the open source GeoViz Toolkit as a base to create such visualizations with. I provide an overview of the design of the GeoViz Toolkit, and the methods that were used to extend it to support temporal and social graph data. I also describe the leading open source alternatives in this problem space.

For more information, contact Krista Kahler at

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