Utility tools for GLIMS

These tools are designed to be used by the GLIMS community. See the related GLIMS Algorithms page.

Web-based Tools

ASTER gain calculator
An on-line tool to calculate ASTER gain settings appropriate for snowy targets as a function of day-of-year, latitude, and ASTER band number.
Shapefile flattening tool
An on-line tool to "flatten" shapefiles. Some people have digitized glaciers in such a way that internal rock outcrops (nunataks) have been represented by "holes" in the glacier polygon. In the shapefile itself, these "holes" are sub-parts to the main glacier polygon, and share attributes with it. The GLIMS Data Transfer Specification, however, requires that internal rock outcrops be represented by their own top-level polygons, so that they can be individually attributed. This tool converts shapefiles with glacier polygons containing holes into shapefiles where the holes have been made into top-level polygons. These new polygons inherit all the attributes of their parents, except that the "category" attribute is set to "intrnl_rock". For best results, the input shapefile(s) should already have the attribute "ID" populated with GLIMS glacier IDs, and the attribute "category" populated with "glac_bound".

Upload a tar or zip archive of one or more 'segments' shapefiles. The archive may contain subdirectories.
GLIMS glacier ID generation tool
An on-line tool to generate GLIMS glacier IDs from a list of longitude/latitude coordinates.

Downloadable Tools

Ice-divide algorithms
ArcInfo and ArcMap procedures for determining ice divides between mountain glaciers, developed and contributed by William Manley.
Software for displaying ASTER and other imagery and digitizing glacier boundaries. It can also be used to add GLIMS attributes to existing glacier outline data and to format for ingest into the GLIMS Glacier Database.