Dot density is a type of point pattern map that uses non-proportional points to show the density of the measured data. The dot density map above if showing the amount of rangeland there was throughout the United States in 2007. One dot on this map represents 25,000 acres of rangeland. As you can see the distribution of dots (acres of rangeland) is very dense in the western United States, but very sparse in the east. Dot density distribution maps can be very beneficial when trying to determine the density of a specific type of place, object, or species.
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