2020 Cartographic Boundary File (KML), Current Census Tract for Iowa, 1:500,000

The 2020 cartographic boundary KMLs are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically...2020年制图边界KML（Keyhole标记语言）文件是从美国人口普查局（U.S. Census Bureau）的主地址文件（Master Address File）及拓扑……中遴选得到的部分地理区域的简化表达形式。