srtm2sdf man page
man(1) srtm2sdf man(1)
srtm2sdf - Generate SPLAT Data Files (SDFs) from 3-arc second STS-99
Space Shuttle Topography Mission (SRTM-3) elevation data files.
[1msrtm2sdf [22m[options] file
[1msrtm2sdf [22mis a utility that generates SPLAT Data Files (SDFs) from 3-arc
second STS-99 Space Shuttle Topography Mission (SRTM-3) elevation data
files. This data is of a much higher quality than that contained in
older USGS Digital Elevation Models of the same resolution. However,
many SRTM-3 Version 2 elevation models contain data "voids" and "wells"
that are the consequence of the radar mapping process.
The srtm2sdf utility has the ability to detect and replace SRTM data
outliers with equivalent SDF data created through the usgs2sdf utility
(below). If equivalent USGS-derived SPLAT Data Files are not available,
SRTM outliers are handled either through adjacent pixel averaging, or
by threshold limiting using user-specified limits. Of all three meth-
ods, the USGS-derived SDF replacement method yields the best results.
The srtm2sdf utility accepts command-line options as follows:
-d used to specify the directory path to the location of existing
SDF files The -d option overridesthe default path specified in
your $HOME/.splat_path file.
-n used to specify the elevation (in meters) below which SRTM data
is replaced. Below this limit, SRTM elevation data is either
replaced using existing SDF equivalent files, or averaged among
adjacent elevation data points. The default threshold for the
replacement limit is sea-level (0 meters). Unless elevations
below sea-level are known to exist for the region being pro-
cessed by the srtm2sdf utility, the -n option need not be speci-
srtm2sdf -d /cdrom/sdf N40W074.hgt
srtm2sdf -d /dev/null N40W074.hgt
srtm2sdf -n -5 N40W074.hgt
No known bugs at this time.
Sindre Pedersen Bjordal (email@example.com)
2007 - Text copyed from README
1.0 09 December 2007 man(1)