This User Guide contains information about the NSPL including: directory content; data currency; the methodology for assigning areas to postcodes; data formats; data...
Approximate polygon areas of ZIP Code + 4 routes for USPS. Created by geocoding address points through www.SmartyStreets.com on 03/23/2017, to retrieve ZIP codes for each point. Then grouped into poly
This study is part of the American National Election Studies (ANES), a time series collection of national surveys fielded since 1948. The American National Election Studies are designed to present dat
