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Federal
2014 Surface Elevation and Vegetation Canopy Cover Surveys of Jamaica Bay, NY, GIS Files
Department of the Interior —
This dataset contains the GIS files representing marsh surface elevation for points surveyed within a 20 m by 20 m grid pattern and their corresponding vegetation... -
Federal
Digital Geologic-GIS Map of Johnstown Flood National Memorial and portions of Allegheny Portage Railroad National Historic Site, Pennsylvania (NPS, GRD, GRI, JOFL, JOFL_ALPO digital map) adapted from a Pennsylvania Geological Survey Water Resource Report map by McElroy (1998)
Department of the Interior —
The Digital Geologic-GIS Map of Johnstown Flood National Memorial and portions of Allegheny Portage Railroad National Historic Site, Pennsylvania is composed of GIS...