The accessibility of people from a given point; that is, a measurement of how near people are to a point. The population potential at one place is the sum of the ratios of population at all other points to the distances from the place in question to those points. Thus:
where the population potential (V1) at point i is the summation (Σ) of n populations (j) accessible to the point i divided by their distance (dij)to that point. Transport costs may be used instead of distance. Note the similarity with the equation for market potential.
