U.S. Census Blocks
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下载链接：
https://crb-open-data-usgs.hub.arcgis.com/maps/d795eaa6ee7a40bdb2efeb2d001bf823
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资源简介：
This feature layer, utilizing National Geospatial Data Asset (NGDA) data from the U.S. Census Bureau, displays Census Blocks in the United States. Blocks are statistical areas bounded by visible features, non-visible boundaries, and short line-of-sight extensions. This layer is checked weekly for updates
创建时间：
2021-06-30
