ZIPCodesPlus4
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资源简介：
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 polygons based on their ZIP+4 codes using Thiessen (Voronoi) polygons. Note: Sandy Springs PO boxes also have 3 zip codes: 30358 31150 31156 These are used solely for PO Boxes, no street addresses.
创建时间：
2020-04-14
