If you are behind a proxy you must set the corresponding java system properties http.proxyHost and http.proxyPort when you invoke gpsdings (i. e.
java -Dhttp.proxyHost=my.proxy.com -Dhttp.proxyPort=8080 -jar gpsdings.jar). gpsdings elevations will process standard input to standard output if no files are specified or if a dash (-) is used in place of the files argument.
USAGE: gpsdings elevations [options] [<file(s)>] -T,--Trkpt Add elevations to track points (trkpt elements). -R,--Rtept Add elevations to route points (rtept elements). -W,--Wpt Add elevations to way points (wpt elements). -O,--Overwrite Overwrite existing elevation information. -t,--todir <dir> Save processed files to this directory. This argument is required when you are processing files (as opposed to standard input). -c,--cache-dir <dir> Sets the directory where hgt files are stored locally. The default is the temporary directory (as defined by the system property java.io.tmpdir). -h,--help Print this help and exit. -l,--license Display the licenses for this program and included libraries.GPX 1.1 can be created from a lot of other geo-coordinate formats with GPSBabel. Use the option "gpxver=1.1" in GPSBabelGUI or "-o gpx,gpxver=1.1" for command line gpsbabel.
This program is licensed to you under the GNU General Public License version 3.