Geovisualization

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Geovisualization, also called cartographic visualization, is a set of tools and techniques that help people analyze geospatial data through interactive visuals. Like other visualization fields, it focuses on creating knowledge rather than just storing information. It presents geographic data in ways that, together with human thinking, let people explore data and make decisions.

Unlike traditional, static maps, geovisualization and GIS let you interact with maps. You can turn layers on and off, zoom in or out, and change how the map looks, all in real time on a computer screen. This field takes advantage of modern computers to redraw maps quickly so users can explore data and test ideas on the fly.

The idea of visualization has a long history. The term appeared in 1953, and in 1987 the National Science Foundation described visualization as a blend of computer graphics, image processing, and user studies, with an emphasis on discovering new ideas. Geovisualization emerged as a distinct field in the early 1980s, influenced by French thinker Jacques Bertin, who explored how dynamic visuals can prompt scientific insight. In 1995, the International Cartographic Association set up a Commission on Visualization and Virtual Environments, underscoring its ongoing growth. Geovisualization is closely related to scientific and information visualization and often uses the map metaphor to show non-geographic information as well. It also connects to urban simulation.

Geovisualization is used in many real-world tasks. Firefighters use sandbox-style tools like SimTable to model terrain, fire behavior, and weather for planning. In Europe, foresters used geovisualization to explore large sets of time-based forest data over the Internet, helping a broader audience interact with the information. Archaeologists can map and explore ancient environments in three dimensions, fostering collaboration with computer scientists. Environmental planning often uses geovisualization to compare scenarios and help stakeholders make balanced decisions that consider many factors.

Two broad uses exist: a professional, private-domain side where experts explore data and form hypotheses, and a public-domain side where professionals share ideas with the general public. Planning often relies on public input, using 3D representations of urban redevelopment or simulations showing how pollution might spread in the future. The widespread use of the Internet now lets the public participate more easily, speeding up discussions about planning decisions.