ARCUS | Arctic GIS

Arctic Logistics Information and Support (ALIAS) -- Map-interface database of facilities supporting research in the Arctic including research stations and sites, logistics hubs, and cruise tracks

Barrow Area Information Database (BAID-IMS) -- Internet map server application with several data layers for the Barrow, AK area, including base maps and information on research activities
CEON - Internet Map Server (CEON-IMS) -- The Terrestrial Circumarctic Environmental Observatories Network IMS - excellent online GIS that enables visualization and search ability of observational platforms and other Circumarctic thematic layers
Geographic Information Network of Alaska (GINA) --Three internet map servers in test deployment to access image and GIS data layers
NSF's Arctic Research Project Locations -- Veco Polar Resources' interactive map search of NSF-sponsored Arctic field research
Sea Ice Maps - Lars Kaleschke, at the University of Bremen, provides online high resolution sea ice concentration maps derived from satellite sensors
UNEP.Net Arctic Environmental Atlas -- Internet map server with layers of environmental variables for the Arctic region, collected primarily from global data sources

Earth System Atlas -- Internet map server with several global-extent data layers; multi-agency mapping initiative led by International Geosphere-Biosphere Programme (IGBP)
Geography Network -- ArcExplorer Web module searches international network for internet map services; primarily global and national data
Globalis -- Interactive world atlas with global-extent data layers from the Human Development Report 2003
State of the Canadian Cryosphere -- Site includes animated maps of some cryospheric variables for Canada
UNEP.Net GEO Data Portal -- Portal to environmental data sets used by UNEP and its partners in environmental assessments; can select datasets and create maps on-the-fly