United States Sources

U.S. Department of Agriculture

The USDA monitors agricultural production in the United States, monitors soils, oversees agricultural extension offices throughout the United States, and compiles statistics relating to these activities.

Geodata Portal

The Geodata portal is described as a one stop center for geographic data from the federal, state and local governments.

Web Soil Survey

This interactive site allows users to access county soil survey information from throughout the United states and create maps of areas of interest to them.

USGS Wisconsin Water Science Center

This site provides information from the USGS exclusively on water resources in the state of Wisconsin such as water quality, stream flow, and groundwater levels.


This database from the Environmental Protection Agency provides water quality data for wetlands, oceans and watersheds from across the United States.

U.S. Gazetteer

The U.S. Gazetteer is a database maintained by the United States Census Bureau.

FEMA Flood Map Service Center

This site maintained by the Federal Emergency Management Administration provides interactive flood hazard maps for the entire United States.

Astronomical Atlas Online

This site maintained as a collaboration between the United States Navy and the Royal Navy provides a annual schedule of predicted astronomical events.


The National Institutes of Health maintains this site which allows users to create maps cross tabulating data fields from mortality statistics with the Toxic Release Inventory (TRI)from the Environmental Protection Agency.


This site presented by the National Library of Medicine provides information about the occupational exposure to hazardous materials.

U.S. Forest Service

This is the web portal for the U.S. Forest Service, the agency responsible for overseeing the management of our nation's forests.


Treesearch is a database for searching the digital collection of U.S. Forest Service Research Station publications.

GRIN Taxonomy for Plants

GRIN taxonomic data provide the structure and nomenclature for accessions of the National Plant Germplasm System (NPGS), part of the National Genetic Resources Program (NGRP) of the United States Department of Agriculture's (USDA's) Agricultural Research Service (ARS).

Life Sciences Data Archive

This site provides information about information and data gathered by NASA through experiments conducted in conjunction with space flights.