Population Area Centerpoint
From The RadioReference Wiki
Population Area Centerpoints
Description
A population area centerpoint is the center of mass of a populated area that includes States, Counties, Metropolitan areas, Cities, Towns. This information will be used in the programming of the new BCD996T and BCT15 scanners that include location based scanning capabilities.
The Site/System location setting on the scanners can be set for 0.5, 1, 3, 5, 10, 20, 30, 50 miles radius. This will create a circle of as small as 1 mile and as large as 100 miles in diameter. These circles should be placed over either the coverage area of a site or system or the center of population mass.
The information below will be used as a reference for adding this information to your site/system settings you program in these scanners