skos:definition"standard deviation of altitude (in meter) in a 5 km radius around the station location according to the Shuttle Radar Topography Mission (SRTM) , maintained by SRTM 90m DEM Digital Elevation Database at CIAT-CSI SRTM (http://srtm.csi.cgiar.org) data URL: http://srtm.csi.cgiar.org/SELECTION/inputCoord.asp"