Population within 1/2 mile of rail lines in Pennsylvania by zip code.
Population within 1/2 mile of rail lines in Pennsylvania by zip code.  Calculations were made using Census Tract level data, calculating the area in Great Lakes Basin Albers projection, forging a union with zip code boundaries, selecting and disolving areas common to both data layers, calculating the new geometry, and comparing the ratio of the new geometry to the older version.
[]
nan
nan
nan