|Activity 2: The Visual Presentation of Spatial Data|
|In addition to showing position, a map can be used to show other characteristics at any point on the Earth’s surface. For example, we could describe a particular spot by its elevation, the number of individuals living in the vicinity, or the weather it was experiencing on March 27, 1997. Contour maps summarize visually spatiallydistributed numerical data.|
Fig. 1: Map showing the acidity of rainfall across the United States between March 25 and April 21, 1991.
|Rules for creating a contour map. Practice drawing a contour map|