Census_Block_Groups_2000

This layer is not created by the City of Philadelphia but is provided for mapping purposes. For further information about this layer, see the documentation on Census.Gov.本图层（layer）并非由费城市政府创制，仅服务于制图需求。如需了解该图层的更多信息，请参阅美国人口普查局（Census.Gov）官网的配套文档。