1. SRTM30 enhanced global map : Slope Date: 2003 Geographic region: EarthEastern HemisphereWestern HemisphereNorthern HemisphereSouthern HemisphereAfricaAsiaAustraliaEuropeNorth AmericaSouth AmericaPolar regions180.00000090.000000-90.000000-180.000000 Extent: E. Rodríguez, et. al