Arctic GIS | Maps & Data Links

ARCSS Data Coordination Center -- Data repository for NSF-funded Arctic System Science (ARCSS) data; several GIS data layers available
Geographic Information Network of Alaska (GINA) -- Access data held or indexed by GINA through an Internet Map Server, searchable metadata catalog, or map gallery
International Bathymetric Chart of the Arctic Ocean (IBCAO) -- Download the IBCAO Grid bathymetric map data for the Arctic Ocean
International Observatory of the North -- Browse and download satellite images from AVHRR, MODIS, and Landsat sensors
National Snow and Ice Data Center -- Cryospheric data for the polar regions; several GIS data layers available from various data providers; search or browse for data
SynCon Project -- Data system for Synthesis and Analysis of Arctic Contamination Data; several GIS datasets available through public data access section

Earth System Atlas -- Download global-extent data layers; multi-agency mapping initiative led by International Geosphere-Biosphere Programme (IGBP)
European Space Agency (ESA) Satellite Imagery -- Earth observation satellite images from the ESA
FGDC National Spatial Data Clearinghouse -- Search collection of over 200 local, national, and international spatial data servers for links to geospatial data
Geography Network -- Global network of GIS providers managed by ESRI, search for geospatial data; primarily links to global and national coverage
Land Processes Distributed Active Archive Center -- NASA/USGS site providing global data collected by various satellite and aerial sensors
UNEP.Net GEO Data Portal -- United Nations Environment Network data portal. Display selected data as maps or graphs, or download datasets, including GIS coverages

Canadian Geospatial Data Infrastructure/GeoConnections -- Search or browse for geospatial data for Canada
GIS Data Depot -- GIS Data section of GeoCommunity website; links to primarily national (U.S. and Canada) GIS data
Land Resources of Russia -- Online version of CD-ROM providing comprehensive data on the land characteristics of Russia; download GIS coverages
Northern Information Network -- Search directory of geo-referenced databases for the Yukon, Northwest territories, and Nunavut
NSDI Geospatial One-Stop -- U.S. National Spatial Data Infrastructure (NSDI) portal to geospatial data; links to state, regional and local government clearinghouses
USDA National Cartography and Geospatial Center (NCGC) -- USDA Natural Resources Conservation Service data access, internet mapping, geospatial data gateway
USGS National Mapping Information -- U.S. Geological Survey's Geography site, with links to geospatial data; primarily national extent

Alaska Geospatial Data Clearinghouse -- Alaska GIS clearinghouse site, with links to a variety of AK-wide datasets, including base maps and ecological datasets
Alaska Sea Ice Atlas -- GIS-based Alaska Sea Ice Atlas of sea ice conditions in the territorial waters of Alaska
Alaska State Geospatial Data Clearinghouse -- Portal to Alaska state and local government geo-spatial maps and data
NPS Alaska GIS Data Service -- National Park Service, Alaska support office GIS Data Clearinghouse; provides GIS coverages for national parks of Alaska

Quaternary GIS Laboratory -- Several GIS layers available for download related to Alaska and Beringia