sdtsdemread
(Removed) Read data from SDTS raster/DEM data set
sdtsdemread
has been removed. Use readgeoraster
instead. For more information, see Compatibility Considerations.
Syntax
[Z, R] = sdtsdemread(filename)
Description
[Z, R] = sdtsdemread(filename)
reads
data from an SDTS DEM data set. Z
is a matrix containing
the elevation values. R
is a referencing matrix.
NaNs
are assigned to elements of
Z
corresponding to null data values or fill data
values in the cell module.
filename
can be the name of the SDTS catalog directory file
(*CATD.DDF
) or the name of any of the other files
in the data set. filename
can include the directory name;
otherwise filename
is searched for in the current
directory and the MATLAB® path. If any of the files specified in the catalog directory
are missing, sdtsdemread
fails.
Tips
Elevation values can be imported with sdtsdemread
from DEMs
that use the SPRE Raster Profile (in use since January, 2001) as well as
from older SDTS DEM data sets. Under this profile, elevations can be encoded
either as 32-bit floating-point numbers (when their units are
“decimal meters”), or as 16-bit integers (when units are
“feet” or “meters”). The output class from
sdtsdemread
for both types of elevation encoding
is double
.