GTOPO30 is a global digital elevation model (DEM) with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer)… (http://eros NULL.usgs NULL.gov/#/Find_Data/Products_and_Data_Available/gtopo30_info)
Archive for August, 2012
GTOPO30
Wednesday, August 22nd, 2012
Марс атакует
Wednesday, August 15th, 2012
Панорама поверхности Марса (http://panoramas NULL.dk/mars/greeley-haven NULL.html)
Greeley Haven
Photo:ї NASA JPL