usgsdems (Mapping Toolbox)

USGS 1-Degree (3-arc-sec resolution) DEM file names

Syntax

[fname,qname] = usgsdems(latlim,lonlim)

Background

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 file names of these 1 degree datasets are taken from the names of cities or features in the quadrangle, determining which files are 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 file names for a given geographic region.

Description

[fname,qname] = usgsdems(latlim,lonlim) returns cell arrays of the DEM file names 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.

Remarks

This function only returns file names for the contiguous United States.

Examples

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'

See Also

usgsdem
Read USGS digital elevation maps

`usgsdem`	Read USGS digital elevation maps

References

See reference [7] in the Bibliography located at the end of this chapter.

usgsdem vmap0data