The National Elevation Dataset (NED) consists of high precision ground surface elevation data for the United States. It is maintained by the USGS and all the data are in public domain
Read more about National Elevation Dataset: Source, Formats, Precision
Famous quotes containing the words national and/or elevation:
“The cinema is going to form the mind of England. The national conscience, the national ideals and tests of conduct, will be those of the film.”
—George Bernard Shaw (1856–1950)
“It was not till the middle of the second dance, when, from some pauses in the movement wherein they all seemed to look up, I fancied I could distinguish an elevation of spirit different from that which is the cause or the effect of simple jollity.—In a word, I thought I beheld Religion mixing in the dance.”
—Laurence Sterne (1713–1768)