Alaska PaleoGlacier Atlas

APG Atlas: GIS Data

The links below allow you to download the APG Atlas and related layers for use in ArcView, ArcGIS Desktop, free ArcExplorer, and other GIS programs that can import coverages or shapefiles. The Late Wisconsin (LW) and Pleistocene Maximum (MAX) layers can be downloaded as shapefiles (recommended) or as coverages. Shapefiles are distributed as both polygons (glacier extents) and lines (glacier limits, coded by certainty).

Please note:

  • The files below cannot be viewed in a web browser or graphics application.
  • Projection and datum: Alaska Albers, NAD27
  • Compressed folders in .zip format can be opened by a variety of utilities such as WinZip and Stuffit Expander.
  • Use your web browser to download the files (right-click on download links)
  • Please read the metadata!

    SHAPEFILES

Late Wisconsin Polygon and Line Shapefiles

Metadata:

Download a compressed folder: apg_lw_shp_v1.zip (0.9 MB)

The folder contains 2 shapefiles and related information:

  • polygons: LW Glaciers (apg_lwgl_v1.shp)
  • lines: LW Limits (apg_lwlmt_v1.shp, coded by extent certainty)
  • metadata, legend, layer, map document, and readme files

Pleistocene Maximum Polygon and Line Shapefiles

Metadata:

Download a compressed folder: apg_max_shp_v1.zip (0.3 MB)

The folder contains 2 shapefiles and related information:

  • polygons: MAX Glaciers (apg_maxgl_v1.shp)
  • lines: MAX Limits (apg_maxlmt_v1.shp, coded by extent certainty)
  • metadata, legend, layer, map document, and readme files

    OTHER LAYERS

1:1,000,000-scale Modern Glaciers can be downloaded from the Alaska State Geospatial Data Clearinghouse.
The 1:250,000-scale State Outline can also be downloaded from the Alaska State Geospatial Data Clearinghouse.
A 1 km Digital Elevation Model (DEM) can be downloaded from the Alaska Geospatial Data Clearinghouse.

APG Late Wisconsin Polygon Coverage

Metadata

Download the coverage (right-click) in "Interchange File Format", apg_lw_v1.e00 (1.7 MB), then use "Import" or ArcToolbox to convert the .e00 file to a coverage.

APG Pleistocene Maximum Polygon Coverage

Metadata

Download the coverage (right-click) in "Interchange File Format", apg_max_v1.e00 (0.4 MB), then use "Import" or ArcToolbox to convert the .e00 file to a coverage.

    RELATED LINKS

Alaska PaleoGlacier Atlas