USGS 1-degree (3-arc-sec) DEM filenames for latitude-longitude quadrangle
[fname,qname] = usgsdems(latlim,lonlim)
[fname,qname] = usgsdems(latlim,lonlim) returns
cell arrays of the DEM filenames and quadrangle names covering the
geographic region. The region is specified by scalar latitude and
longitude points or two-element vectors of latitude and longitude
limits in units of degrees.
The U.S. Geological Survey has made available a set of digital elevation maps of 1-degree quadrangles covering the contiguous United States, Hawaii, and limited portions of Alaska. These are referred to as 1-degree, 3-arc second or 1:250,000 scale DEMs. Because the filenames of these 1 degree data sets are taken from the names of cities or features in the quadrangle, determining the files needed to cover a particular region generally requires consulting an index map or other reference. This function takes the place of such a reference by returning the filenames for a given geographic region.
Which files are needed to map part of New England?
usgsdems([41 44], [-72 -69]) ans = 'providence-w' 'providence-e' 'chatham-w' 'boston-w' 'boston-e' 'portland-w' 'portland-e' 'bath-w'