USPopulationSampler - Population-Weighted Sampling of Geographic Locations in the
United States
Generate geospatial locations within census block groups
(BG; the smallest geographic unit for which population counts
are available) within target counties, states, or across the
entirety of the U.S. randomly selected according to population
counts by using the Census Bureau reference data and optionally
allow users to conduct temporal assignments on sampled
locations using Covid-19 data.