Mapping Toolbox™

globedems - GLOBE data filenames for latitude-longitude quadrangle

Syntax

fname = globedems(latlim,lonlim)

Description

fname = globedems(latlim,lonlim) returns a cell array of the filenames covering the geographic region for GLOBE DEM digital elevation maps. The region is specified by scalar latitude and longitude points, or two-element vectors of latitude and longitude limits in units of degrees.

Background

GLOBE, the Global Land One-km Base Elevation data, was compiled by the National Geophysical Data Center from more than 10 different sources of gridded elevation data. The data set consists of 16 tiles, each covering 50 by 90 degrees. Determining which files are needed to cover a particular region generally requires consulting an index map. This function takes the place of such a reference by returning the filenames for a given geographic region.

Remarks

The globedems function reads data from GLOBE Version 1.0. GLOBE DEM first reads the corresponding ESRI header file found in the subdirectory '/esri/hdr/' and then the binary data file (with no extension).

Examples

Which files are needed for southern Louisiana?

latlim =[28.61 31.31]; lonlim = [-91.24 -88.62];
globedems(latlim,lonlim)

ans = 
    'e10g'
    'f10g'

References

See Web site for the National Oceanic and Atmospheric Administration, National Geophysical Data Center