================
Utilities for use with SPLAT! software are found under the
-splat-1.2.1/utils directory. They include the following:
+splat-1.3.0/utils directory. They include the following:
srtm2sdf
========
-The srtm2sdf utility 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 generates SPLAT Data Files (SDFs) from STS-99
+Space Shuttle Topography Mission (SRTM) 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
+Version 2 elevation models contain data "spikes", "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 methods,
-the USGS-derived SDF replacement method yields the best results.
+outliers with equivalent usgs2sdf derived SDF data (see usgs2sdf below).
+If such data is not available, SRTM outliers are handled either through
+adjacent pixel averaging, or by threshold limiting using user-specified
+limits. Of all three methods, the USGS-derived SDF replacement method
+yields the best results.
-SRTM-3 Version 2 Elevation Data may be downloaded from:
+The srtm2sdf utility processes SRTM-3 3-arc second resolution data
+or use with SPLAT! operating in standard definition mode.
+
+SRTM-3 Version 2 Elevation Data files may be downloaded from:
ftp://e0srp01u.ecs.nasa.gov:21/srtm/version2/
The srtm2sdf utility accepts command-line options as follows:
--d: used to specify the directory path to the location of existing
- SDF files (presumably created at an earlier date through the
- usgs2sdf or postdownload utility) that are to be used to replace
- outliers found in the SRTM data file. The -d option overrides
- the 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
- processed by the srtm2sdf utility, the -n option need not be
- specified.
+-d: used to specify the directory path to the location of usgs2sdf
+ derived SDF files that are to be used to replace outliers found
+ in the SRTM data file. The -d option overrides the default path
+ specified in your $HOME/.splat_path file.
+
+-n: used to specify the elevation (in meters) below which SRTM data
+ is either replaced with usgs2sdf-derived SDF data, 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
+ processed by the srtm2sdf utility, the -n option need not be
+ specified.
Some examples of srtm2sdf use:
.sdf file to your SPLAT! working directory.
+srtm2sdf-hd
+===========
+The srtm2sdf-hd utility operates in an identical manner as srtm2sdf,
+but is used to generate HD SDF files from SRTM-1 one-arc second
+resolution data files for use with SPLAT! HD. SRTM-1 data files
+are available for the United States and its territories and
+possessions, and may be downloaded from:
+
+ ftp://e0srp01u.ecs.nasa.gov:21/srtm/version2/SRTM1/
+
+
usgs2sdf
========
The usgs2sdf utility takes as an argument the name of an uncompressed
takes as an argument the name of the gzipped Digital Elevation Model
(DEM) downloaded from the US Geological Survey (ie: wilmington-w.gz).
postdownload uncompresses the DEM file, adds necessary record delimiters,
-and invokes usgs2sdf to produce a SPLAT Data File (SDF).
+and invokes usgs2sdf to produce a SPLAT! Data File (SDF).
USGS Digital Elevation Models may be downloaded from:
citydecoder pl34 | sort > cities.nj.dat
-A list of FIPS codes (fips.txt) is included under splat/utils for your
-convenience.
+A list of FIPS codes (fips.txt) is included under splat-1.3.0/utils
+for your convenience.
fontdata
fontdata s.fnt.gz
+bearing
+=======
+The bearing utility reads a pair of .qth files specified on the command
+line, and returns the azimuth bearing and great circle path distance between
+the two points specified. A -metric switch is available so that distances
+can be provided in kilometers rather than statute miles. SPLAT! provides
+similar distance and bearing information between two specific site locations.
+The bearing utility, however, provides the information quickly and easily
+over great distances without having to run SPLAT!
+
+
Building The Utilities
======================
Normally, these utilities are built and installed along with SPLAT!
---
John A. Magliacane, KD2BD
-August 2007
+August 2008
projects / debian / splat / blobdiff