(Office of Planning, State of Hawaii) The state GIS Program provides access to downloadable GIS layers covering topics such as water resources, land use, animal habitats, tsunami inundation zones, and soils.
(Geography Department, UH Manoa) The Rainfall Atlas of Hawaiʻi is an interactive set of maps of the spatial patterns of rainfall for the major Hawaiian Islands. Maps are available for mean monthly and annual rainfall for the 30-yr base period 1978–2007. Rainfall maps and station rainfall measurements can be downloaded.
(U.S. Geological Survey, Department of the Interior) The USGS offers several mapping products from this Web site including the most up-to-date editions of topographic quadrangle maps containing geospatial extensions (US Topo) and searchable access to their historical topographic map collection.
(U.S. Environmental Protection Agency) EIS Mapper displays information from EPA’s Environmental Impact Statement (EIS) Database which provides data about EISs prepared by federal agencies, as well as EPA's comments concerning the EISs.