FIGURE 7.2 A raster-based map of Santa Barbara County. Relief ranges from black (low) to white (high), and streams are recorded as a raster of cells in which each cell is associated with one gray level.

FIGURE 7.3 Map of the United States recorded on a vector GIS of polygons, lines, and points. It was created using ArcExplorer Java Edition for Education. It depicts lakes (in blue), states (in shades of green to gray showing median age), lines (rivers in blue and interstate highways in red), and points (cities are black squares).