How does one map Hawaii? It's not an easy proposition, but the United States Geological Survey (USGS) has been doing just that for over a century. The University of Hawai'i at Manoa Library has created this digital archive of topographical quadrangles for the state of Hawaii, and they are a real find. Visitors to the site will note that they can view the maps by island and that each map also contains a helpful index that can aid users in their search for specific areas of interest. Additionally, visitors can view historical USGS maps from 1910 to 1933 that provide additional layers of data about these rather unique locales.