Computing contour map using topological cases and classifier cases

Abstract

A computing device including one or more processing devices configured to receive raster data including raster data values. The processing devices obtain classifier grid data including classification values selected from among two or more classes. The processing devices generate a contour map by, for each of the classes, generating contour segments connecting pairs of grid locations included in the raster data. Generating the contour segments includes computing respective topological cases of cells of a superimposed grid, which includes cells of the raster data that are associated with respective classification values. Generating the contour segments further includes computing respective classifier cases of the cells. The contour segments are computed based on the topological cases and classifier cases of the cells and are combined into contours. The contour map is computed as a visual representation of the contours. The processing devices output the contour map for display at a display device.