Introduction to 2-D Visualization
Two dimensional (2-D) data has a magnitude and two locations. Typically these locations are spatial locations (though they need not be) and are referred to as x-y locations.
2-D visualization intermixes closely with fields such as Digital Image Processing and can commonly be seen as digital images (X & Z locations with color data at each) or maps (Lat & Lon locations). Visualization methods that are useful for 2-D data include contour lines, flow visualization, and simple surface rendering.