It provides vernacular, English, and historical names, as well as additional information about the places. Although the hierarchy of TGN represents the current political world, the structure allows for the addition of historical hierarchies. Links to Mapping Related Sites From Terra Data, which develops, markets and supports Geocart, the map projections program for the Macintosh. Reports contain information on storm paths, deaths, injuries, and property damage. The December issue includes annual tornado, lightning, flash flood, and tropical cyclone summaries.
Some stations provide daily snowfall, snow depth, evaporation, and soil temperature data.
The July issue also contains monthly heating degree days and snow data for the preceding July through June. The Annual issue contains monthly and annual averages of temperature, precipitation, temperature extremes, freeze data, soil temperatures, evaporation, and a recap of monthly cooling degree days. Published data are displayed in inches to tenths or inches to hundreths at local standard time. The site also has extensive links to other Geographic Information Servers. An extensive Collection from UC Boulder.