 	A global elevation model, prepared from the 3 arc-second SRTM dataset by filling some of the problem areas. Prepared by the NASA Learning Technologies. 	The default style is scaled to 8 bit, non-linear. 	It is possible to request the elevation data in meters by the short_int tyle and requesting PNG format. The resulting PNG file will be a unsigned 16 bit per pixel image. The values are then the elevation in meters. 	Values are signed 16 bit integers, but PNG will present them as unsigned, leading to a few areas with very large values (65000+) 	For elevation values in feet, request PNG format with the style feet_short_int.       