How large is the NED data set?
Really big. The 10-meter (1/3 arc second) NED data set alone is over 460 GB. A major advantage of LatLonToElevation.com is that it provides access to very large elevation data sets at just the points your need; this often eliminates the need to download large elevation data sets to your computer. The data sets are also continuously being improved upon and updated by the USGS. Because LatLonToElevation.com references the most recent data, you don’t have to worry that your data are out of date or are not the best available from the USGS.
