1972. International Heat Flow Commission, International Association of Seismology and Physics of the Earth's Interior, and Oklahoma State University. Department of Geography. Cartography Service. This point shapefile contains heat flow data for Ghana compiled from sources in 1972. Heat flow is a measure of heat loss across the surface of the... International Heat Flow Commission.
2013. Centro Nacional de Registros (El Salvador). This polygon shapefile represents inland waters in El Salvador. The Global Map El Salvador version 2 was developed from Geographic Maps Data 2008 ... International Steering Committee for Global Mapping.
Tanganyika, Survey Division. compiled, drawn, and printed by the Survey Division, Ministry of Lands, Settlement, and Water, Tanganyika, 1964. Relief shown by spot heights. The Division.