Define virtual representation7/22/2023 2DLayers (vector layers): These layers represent the common geography layers of a GIS, such as points, polylines, text and lines. ![]() This section classify the different structures used as layers in the simulation model in this study (Fonseca and Casanovas et al. ![]() This example can be reviewed in the projects section and is based on Rothermel's mathematical model (Rothermel 1972, 1983). A wildfire model using this approach is presented as an example. The nexts sections describe the different elements needed for this use and the data used in the simulation engine. Studies in this area can be reviewed in Benenson and Torrens (2004) and Fonseca and Casanovas (2004). Using a cellular automata to use GIS data in a model is not a new concept. Vector data is shown on the left and raster data is shown on the right.įigure 1: Raster and vector layers of a GIS. Figure 1 explains how reality is represented using these two alternatives. This format comes closer to the natural representation of geographical data on paper. The second format, vector, defines a set of vectors that represent geographical data. This code, usually a real number, can represent different kinds of geographical data, such as elevations and terrain properties. In each cell, a numerical code is defined. The first format, raster, defines a matrix of points. In a GIS, data can be represented in two main different formats (Korte 2001).
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