Fenneman-Johnson Physiographic Subsections
收藏国家林业和草原科学数据中心2023-01-12 更新2024-03-06 收录
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The Fenneman-Johnson Physiographic Subsections feature class contains ecological subsection polygons attributed with physiographic types to show the relationships between ECOMAP 2007 and Fenneman-Johnson physiographic mapping from USGS (1946). The EcomapSubsections 2007 data set contains polygons for ecological subsections within the conterminous United States. It contains regional geographic delineations for analysis of ecological relationships across ecological units. ECOMAP is the term used for a USDA Forest Service initiative to map ecological units and encourage their use in ecosystem-based approaches to forest land conservation and management.
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国家林业和草原科学数据中心
创建时间：
2023-01-12
