Basically, the arithmetic density is the most common method used to measure population density but it decreases as the emigration increases from a particular region being measured.
It refers to the basic calculation of total number of people living in a particular geographical area of land. It measures the total number of individuals per unit area of land.
For example, an arithmetic density of U.S. is the total number of people in the city divided by its landmass in square kilometers. In conclusion, it is significant in understanding the distribution of people in a certain area and also helps in determining areas where urbanization is taking place.
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