a 1993 report by the U.S. Federal Emergency Management Agency (FEMA), NEXRAD RADAR sites, location of airports, location of railroads, and an open street map. Geopolitical layers showed 110th Congressional Districts of the US, country boundary, US states, US counties, and the population of US counties. The hydrology layer showed the US river network. Land ownership, designation and usage layers illustrated boundaries of federal lands and Indian lands, as well as the renewable energy generation potential on Environmental Protection Agency tracked sites according to the Office of Solid Waste and Emergency Response (OSWER) Center for Program Analysis (OCPA). Elevation or land cover layers showed related information. The ecosystem and climate layers displayed: Average Annual Precipitation (1961–1990) Tornadoes (1950–2004) Major Landfalling Atlantic Hurricanes Ecoregions of North America Bailey Ecoregion Köppen climate classification Users could view ranges of five bat species of concern. Bats were killed by wind turbines because the spinning blades cause a drop in air pressure which results in barotrauma. Finally, the soils layer illustrated FAO soil classifications in the US. Target audience Many factors must be considered before the construction of a wind energy facility. Among the most important factors to consider are the potential site's wind resource; access to existing transmission lines; access to a reliable power purchaser or market; and population density around the site. Numerous other economic, geographic, environmental, and political considerations must be taken into account as well. The WENDI Gateway was designed to provide data and information regarding such considerations and thereby serve the needs of an array of wind energy stakeholders. Such stakeholders likely include: Wind farm developers and constructors Public utilities commissions Electric companies Policymakers Environmental scientists Wind energy modelers/forecasters Academia Students and educators See also GIS OpenEI Wind power Wind power in the United States References Wind power in the United States