Data Portals

National Map wide variety of data including DEMs and NLCD.
TIGER--roads and streams--overview. Download TIGER data.
USDA Portal: aerial imagery, topos, DEMS. May get better results using an ftp program rather than internet browser.
Coastal
DEM discovery portal--NGDC
Hazards Data Download, USGS: http://hddsexplorer.usgs.gov/
Natural Earth Data
Africa, from Center for Geographic Analysis, Harvard University
store.usgs.gov: includes a side variety of data, including NGA JOGs (1:250K) in GeoPDF. On the order form, click on the map to get the GeoPDF into the browser window.
USGS NHD--National Hydrography Dataset
Global Multi-Resolution Topography Data Portal "Best" merge of marine (down to 100 m) and land data
U.S. Interagency Elevation Inventory: http://www.csc.noaa.gov/inventory/# (download as Geodatabse)
USDA NAIP: https://naip-usdaonline.hub.arcgis.com/
Fish and Wildlife Service
KML USGS 7.5' Quads

Last revision 3/28/2022