• World Atlas & Maps (About.com)
• MapsOnUS
• MapQuest
• Google Maps
• NMFS MapViewer and Essential Fish Habitat Maps (NMFS Alaska Region)
• NOS Data Explorer
• Maps and Aerial Photo Images (USGS)
• Aerial Products (USGS - Earth Resources Observation System (EROS) Data Center)

• Ground Water Atlas of the United States (USGS)

  Idaho, Oregon, and Washington (Chapter H, 1994)

  Alaska, Hawaii, Puerto Rico and the Virgin Islands (Chapter N, 1999)

• National Atlas of the USA (USGS)
• UN Atlas of the Oceans

Bathymetric Data

• Bathymetry, Topography, and Relief (NOAA/NESDIS/NGDC)
• Pacific Sea-Floor Mapping Data (USGS)
  Includes multibeam bathymetry data for Puget Sound and other areas.
• US Bathymetric and Fishing Maps (NOAA/NOS)
• Marine Geology and Geophysics (NOAA/NESDIS/NGDC)

Nautical Charts and Resources

• Digital Nautical Chart (NIMA)
• Marine Navigation Calculators (NIMA)
• Navigational Charts (NOAA/OCS)
• Coast Pilot
• Historical Map and Chart Collection (NOAA/OCS)

Geographic Names

• Geographic Names Information System (USGS)
  Covers the U.S. and Antarctica.
• GEOnet Names Server (NIMA)
  Worldwide coverage, excluding the U.S. and Antarctica.
• GEOLEX: Geologic Names Lexicon (USGS)
• Washington Place Names (Tacoma Public Library)

GIS (Geographic Information Systems)

• GIS Data for Water Resources (USGS)
• GISDATA Map Viewer (USGS)
• StreamNet Maps and GIS Data

Hydrographic and Hydrologic Data

• Hydrographic Survey Data (NOAA/NESDIS/NGDC)
• Hydrologic Unit Maps (USGS)
• National Hydrography Dataset (USGS, EPA)
• Real-Time (Water) Data for the Nation (USGS)
• Surface-Water Data for the Nation (USGS)
  Includes historical and real-time data and statistics; daily streamflow data included.
• Water-Quality Data for the Nation (USGS)
• Water Resources of the United States (USGS)

Software, Utilities, Standards, and Documentation

• National Mapping Program Standards (USGS)
• Office of Coast Survey Library (NOAA/OCS)
• Public Domain Software for Use with USGS Geographic Data (USGS)
• Software Links from UW Maps Library

Tides and Currents

• Tide and Current Glossary (NOAA/NOS)
• Tides Online (NOAA/NOS)
  Current and historical water level data and statistics.
• Tidal Current Predictions (NOAA/NOS)
• Water Level Tidal Predictions (NOAA/NOS)

Weather and Climate

• Coastal Marine Weather - Pacific Coast (NOAA/NWS)
• National Climatic Data Center (NOAA/NESDIS/NCDC)
• The Weather Channel
• Weather Underground:   AK; ID; OR; WA.
• Yahoo! Meteorological Maps