The NSIDC Web site and data services are currently having intermittent problems and may be unavailable. We are working to restore these services as soon as possible and apologize for any inconvenience this may cause. Please contact NSIDC User Services for assistance.
The Antarctic Cryosphere Access Portal (A-CAP) is a geo-visualization and data download tool developed at the NSIDC Antarctic Glaciological Data Center (AGDC). A-CAP provides access to AGDC data and other Antarctic parameters including glaciology, ice core data, snow accumulation, satellite imagery, Digital Elevation Models (DEMs), sea ice concentration, and many other cryosphere-related measurements.
A-CAP is an interactive map interface that allows users to zoom in and out, overlay coastlines, place names, latitude/longitude, and other geographic information, and access data. A-CAP map images and source data are also accessible via the Open Geospatial Consortium (OGC) Web Map Service (WMS), Web Feature Service (WFS), and Web Coverage Service (WCS). For details and instructions on accessing A-CAP data using these portals, see the A-CAP: OGC Services Web page.
The following features are currently available:
The following features are planned, but not yet available:
Scambos, Ted, John Maurer, Rob Bauer, Jennifer Bohlander, Terry Haran, and Katherine Leitzell. 2008. A-CAP: The Antarctic Cryosphere Access Portal. Boulder, Colorado USA: National Snow and Ice Data Center. Available at http://nsidc.org/agdc/acap/.
Citations for A-CAP data sources are available by clicking on the information icon ( ) next to each layer in the layer-selection frame. Please cite the sources that you have used.
The continued development of this map server application is supported by NASA grants for Antarctic ice velocity mapping (NNG05GO82G) and two awards under the Making Earth System Data Records for Use in Research Environments (MEaSURES) program. Initial development was supported under NSF grant OPP-03338134 to the Antarctic Glaciological Data Center (AGDC).
A-CAP was developed using MapServer, an Open Source development environment for building spatially-enabled Internet applications. Thanks also to the following for their contributions to the A-CAP Web site or for their useful utilities: Scott Lewis (Mapx, APIs), Ross Swick (Mapx), Ken Knowles (Mapx), Bruce Raup (GLIMS), Betsy Sheffield (NSIDC User Services), Ian Howat (G-CAP), Mark Fahnestock (MOA), Cindy Brewer (Color Brewer), Matt Kruse (DHTML tree), Frank Warmerdam (FWTools), GDAL, OGR, PROJ.4, and the MapServer-Users e-list.