sdtsdemread - Read data from SDTS raster/DEM data set
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
(see makerefmat). 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.
Remarks
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.
Example
[Z, R] = sdtsdemread('9129CATD.ddf');
mapshow(Z,R,'DisplayType','contour')See Also
arcgridread, makerefmat, mapshow, sdtsinfo
 | scxsc | | sdtsinfo |  |
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