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class="noprint"></div> <div id="content" class="mw-body" role="main"> <a id="top"></a> <div id="siteNotice"></div> <div class="mw-indicators"> </div> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Converting/NMEA to GPX</span></h1> <div id="bodyContent" class="vector-body"> <div id="siteSub" class="noprint">From OpenStreetMap Wiki</div> <div id="contentSub"><span class="subpages">< <a href="/wiki/Converting" class="mw-redirect" title="Converting">Converting</a></span></div> <div id="contentSub2"></div> <div id="jump-to-nav"></div> <a class="mw-jump-link" href="#mw-head">Jump to navigation</a> <a class="mw-jump-link" href="#searchInput">Jump to search</a> <div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-parser-output"><div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none" /><div class="toctitle" lang="en" dir="ltr"><h2 id="mw-toc-heading">Contents</h2><span class="toctogglespan"><label class="toctogglelabel" for="toctogglecheckbox"></label></span></div> <ul> <li class="toclevel-1 tocsection-1"><a href="#Easy_to_use"><span class="tocnumber">1</span> <span class="toctext">Easy to use</span></a></li> <li class="toclevel-1 tocsection-2"><a href="#Online_Tools"><span class="tocnumber">2</span> <span class="toctext">Online Tools</span></a></li> <li class="toclevel-1 tocsection-3"><a href="#Converting_NMEA_text_dumps_with_gpsbabel"><span class="tocnumber">3</span> <span class="toctext">Converting NMEA text dumps with gpsbabel</span></a> <ul> <li class="toclevel-2 tocsection-4"><a href="#NMEA_to_XML_wrapper_for_gpsbabel"><span class="tocnumber">3.1</span> <span class="toctext">NMEA_to_XML wrapper for gpsbabel</span></a></li> <li class="toclevel-2 tocsection-5"><a href="#On_GNU/Linux_or_other_posix_systems"><span class="tocnumber">3.2</span> <span class="toctext">On GNU/Linux or other posix systems</span></a></li> <li class="toclevel-2 tocsection-6"><a href="#On_Windows"><span class="tocnumber">3.3</span> <span class="toctext">On Windows</span></a> <ul> <li class="toclevel-3 tocsection-7"><a href="#Using_navi-convert"><span class="tocnumber">3.3.1</span> <span class="toctext">Using navi-convert</span></a></li> <li class="toclevel-3 tocsection-8"><a href="#Using_nmea2gpx.cmd"><span class="tocnumber">3.3.2</span> <span class="toctext">Using nmea2gpx.cmd</span></a></li> <li class="toclevel-3 tocsection-9"><a href="#Using_the_DOS_CLI"><span class="tocnumber">3.3.3</span> <span class="toctext">Using the DOS CLI</span></a></li> <li class="toclevel-3 tocsection-10"><a href="#Using_GPSBabel's_GUI"><span class="tocnumber">3.3.4</span> <span class="toctext">Using GPSBabel's GUI</span></a></li> </ul> </li> </ul> </li> <li class="toclevel-1 tocsection-11"><a href="#Converting_NMEA_text_dumps_(with_osmtrackfilter.pl)"><span class="tocnumber">4</span> <span class="toctext">Converting NMEA text dumps (with osmtrackfilter.pl)</span></a></li> <li class="toclevel-1 tocsection-12"><a href="#Gosmore_NMEA_to_GPX_conversion"><span class="tocnumber">5</span> <span class="toctext">Gosmore NMEA to GPX conversion</span></a></li> <li class="toclevel-1 tocsection-13"><a href="#BT747_NMEA_to_GPX_conversion"><span class="tocnumber">6</span> <span class="toctext">BT747 NMEA to GPX conversion</span></a> <ul> <li class="toclevel-2 tocsection-14"><a href="#CLI"><span class="tocnumber">6.1</span> <span class="toctext">CLI</span></a></li> <li class="toclevel-2 tocsection-15"><a href="#GUI"><span class="tocnumber">6.2</span> <span class="toctext">GUI</span></a></li> </ul> </li> </ul> </div> <h3><span class="mw-headline" id="Easy_to_use">Easy to use</span></h3> <p>The easiest way to convert or modify NMEA-files is to use applications like </p> <ul><li><a href="/wiki/RouteConverter" title="RouteConverter">RouteConverter</a></li> <li><a href="/wiki/Prune" class="mw-redirect" title="Prune">Prune</a></li> <li><a href="/wiki/GpsMaster" title="GpsMaster">GpsMaster</a></li></ul> <h3><span class="mw-headline" id="Online_Tools">Online Tools</span></h3> <ul><li><a rel="nofollow" class="external text" href="http://www.gpsvisualizer.com">GPS Visualizer</a></li> <li><a rel="nofollow" class="external text" href="https://richard.dev.openstreetmap.org/upload.cgi">The script will use gpsbabel to convert your tracks to GPX, then upload them to the main server, saving you the effort! </a> "<-- DEAD link?"</li></ul> <h3><span class="mw-headline" id="Converting_NMEA_text_dumps_with_gpsbabel">Converting NMEA text dumps with gpsbabel</span></h3> <p><a href="/wiki/GPSBabel" title="GPSBabel">GPSBabel</a> is a commonly used program to convert from one GPS format to another, and can convert from NMEA to GPX. You can use GPSBabel either as a GUI, via <a href="/wiki/Gebabbel" title="Gebabbel">Gebabbel</a> or a command-line program. If you set up GPSBabel as a command-line program using one of the following scripts, you will avoid wasting a lot of time clicking the graphical user interface. </p><p>GPSBabel can be used on the command line like: </p> <pre>gpsbabel -i nmea -f "nmeafilename" -o gpx,gpxver=1.1 -F "outputfilename.gpx" </pre> <p>NMEA sentences normally store all the data output by the gps including data which is poor. However this can easily be cleaned out by setting filtering options with GPSBabel. The most common need is to filter data which has poor horizontal accuracy due to a lack of satellite visibility or other signal performance issues. The hdop value in the NMEA sentence is used for this. Filtering for data better than 10 is a good compromise between filtering for accuracy but keeping sufficient points where the general quality of the log was poor. Adding the filter to the above command line entry gives: </p> <pre>gpsbabel -i nmea -f "nmeafilename" -x discard,hdop=10 -o gpx -F "outputfilename.gpx" </pre> <h4><span class="mw-headline" id="NMEA_to_XML_wrapper_for_gpsbabel">NMEA_to_XML wrapper for gpsbabel</span></h4> <p>This simple script will convert all NMEA log files in a directory to GPX (or KML) files. It will also optionally join them together into a single output file. </p><p>Download from <a rel="nofollow" class="external text" href="https://github.com/tinyrock/nmea_to_xml">github</a> </p><p>Example converting all .log files in directory (./input) to GPX and KML format and storing in another directory (./output): </p> <pre>python nmea_to_xml.py -gk -i input -o output </pre> <p>Example joining all .log files to a single KML file in ./output/complete.kml: </p> <pre>python nmea_to_xml.py -kj -i input -o output/complete </pre> <p>Richard wrote to scratch-own-itch but welcomes any ideas for improvement. Just submit a new <a rel="nofollow" class="external text" href="https://github.com/tinyrock/nmea_to_xml/issues">issue</a>. </p> <h4><span id="On_GNU.2FLinux_or_other_posix_systems"></span><span class="mw-headline" id="On_GNU/Linux_or_other_posix_systems">On GNU/Linux or other posix systems</span></h4> <p>Use the following bash script to convert multiple files from <a href="/wiki/NMEA" title="NMEA">NMEA</a> to GPX in one operation. Save it as gpxconvert then run it as ./gpxconvert *.TXT for batch mode or ./gpxconvert mynmeafile.TXT for single file mode. </p> <pre>#!/bin/bash unext () { declare -a nameparts num=0 nameparts=($(echo "$1" | sed 's/\./\t/g')) num=$((${#nameparts[*]}-1)) ext="\\$(eval echo ".\${nameparts[$num]}")" seder="s/$ext//g" echo "$1" | sed -e $seder } if [ -z "$1" ]; then echo "Takes a list of inout NMEA files, converts to GPX files." echo "usage: $0 <nmea_input_files>" exit 0 fi echo "" for file in "$@"; do fileNoExt=$(unext "$file") if [ ! -e "$file" ]; then echo "$file input file doesn't exist, Skipping." elif [ -e "$fileNoExt.gpx" ]; then echo "$fileNoExt.gpx already exists. Skipping" else echo "$fileNoExt.gpx - converting" gpsbabel -i nmea -f "$file" -o gpx -F "$fileNoExt.gpx" fi done </pre> <p><br /> The script will skip files where the output file already exists. If you have a folder where you upload your nmea files, you can just drag your new nmea files into the folder then run ./gpxconvert *.nmea (assuming .nmea is your file extension). It will only convert those which haven't yet been converted. You could also run this command as a desktop icon on GNU/Linux or windows. Drag your NMEA files to a folder, click a button then all your NMEA files have a GPX equivalent. </p> <h4><span class="mw-headline" id="On_Windows">On Windows</span></h4> <h5><span class="mw-headline" id="Using_navi-convert">Using navi-convert</span></h5> <p>I have made a batch conversion program which bundles the above script with the <a rel="nofollow" class="external text" href="http://www.fsf.org/licensing/essays/free-sw.html">Free Software</a> GPSbabel and Bash. Grab the bundle and follow step by step instructions from <a rel="nofollow" class="external text" href="http://www.nickhill.co.uk/convert_nmea_to_gpx_on_windows.html">navi-convert</a> <a href="/wiki/User:NickH" title="User:NickH">NickH</a> </p> <h5><span class="mw-headline" id="Using_nmea2gpx.cmd">Using nmea2gpx.cmd</span></h5> <p>nmea2gpx.cmd is a simple DOS/CMD script that does a similar task to navi-convert. It converts NMEA to GPX using GPSbabel. Copy and paste it into a file called nmea2gpx.cmd, create folders 'NMEA' and 'GPX' on the same level, and create folder 'done' within NMEA. All you need do is copy your NMEA logs into the NMEA folder, and run nmea2gpx.cmd </p><p>For each filename.nmea in the folder NMEA, it checks if filename.gpx exists in the folder GPX. If it doesn't, it converts it, then moves filename.nmea to NMEA\done </p> <pre>@echo off setlocal FOR /f "delims=" %%f in ('dir /a-d /b NMEA\*.nmea') do (call :main "%%f") GOTO end :main IF exist "GPX\%~n1.gpx" GOTO:EOF "c:\program files\GPSbabel\gpsbabel.exe" -i nmea -f "NMEA\%~1" -o gpx -F "GPX\%~n1.gpx" move "NMEA\%~1" "NMEA\done\" GOTO:EOF :END </pre> <p>--<a href="/wiki/User:LeedsTracker" title="User:LeedsTracker">LeedsTracker</a> 17:35, 18 August 2008 (UTC) </p> <h5><span class="mw-headline" id="Using_the_DOS_CLI">Using the DOS CLI</span></h5> <p>Another easy solution is to put all your .nmea files in one single directory. You will need <a rel="nofollow" class="external text" href="http://www.gpsbabel.org/">GPSBabel</a> as well. Once this is done, open a DOS prompt, the go in this directory using cd and run the following command: </p> <pre>for %i in (*.TXT) do "<PATH_TO_GPABABEL>\gpsbabel.exe" -i nmea -f %i -o gpx -F %~ni.gpx </pre> <p>For me, <PATH_TO_GPSBABEL> is <i>F:\Mac\GPSBabel\</i>. </p> <h5><span id="Using_GPSBabel.27s_GUI"></span><span class="mw-headline" id="Using_GPSBabel's_GUI">Using GPSBabel's GUI</span></h5> <p>Alternatively, you can use <a rel="nofollow" class="external text" href="http://sourceforge.net/project/showfiles.php?group_id=58972&package_id=54959&release_id=461259">gpsbabel</a> for windows, which provides a GUI. The GUI will likely be much slower to use if you have a number of files to convert. (hint: use the .zip file for windows). </p><p>If it doesn't work post some of the data to the <a href="/wiki/Contact" class="mw-redirect" title="Contact">mailing list</a> and we will help you out. </p> <h3><span id="Converting_NMEA_text_dumps_.28with_osmtrackfilter.pl.29"></span><span class="mw-headline" id="Converting_NMEA_text_dumps_(with_osmtrackfilter.pl)">Converting NMEA text dumps (with osmtrackfilter.pl)</span></h3> <p>osmtrackfilter.pl is one of the <a href="/wiki/Perl_Scripts" title="Perl Scripts"> OSM perl scripts</a> in svn and can convert from several common formats, including nmea and gpsdrive track files to gpx. It also has several helpful features including file reduction to remove duplicate points and date replacement. </p><p>Typical usage to remove date information, for privacy: </p> <pre>perl osmtrackfilter.pl --fake-gpx-date mytextfile.nmea </pre> <p>See the built-in help file for further information: </p> <pre>perl osmtrackfilter.pl -h </pre> <h3><span class="mw-headline" id="Gosmore_NMEA_to_GPX_conversion"><a href="/wiki/Gosmore" title="Gosmore">Gosmore</a> NMEA to GPX conversion</span></h3> <p>Gosmore may just do a better job than other utilities when the data is damaged e.g. by communication errors. To do it you must create a 'fake' gpsd server : </p> <pre>nc -l -p 2947 <mytextfile.nmea & ./gosmore # Close the application and look for GPX file(s) </pre> <h3><span class="mw-headline" id="BT747_NMEA_to_GPX_conversion"><a href="/wiki/BT747" title="BT747">BT747</a> NMEA to GPX conversion</span></h3> <p><a rel="nofollow" class="external text" href="http://www.bt747.org">BT747</a> is written in JAVA and runs on most platforms and can convert NMEA to GPX. It is permissive and can cope with errors in the source file. </p><p>File recognition is extension based, and the source file should end in .nme, .nmea, .txt or .log . </p> <h4><span class="mw-headline" id="CLI">CLI</span></h4> <p>When using the CLI (using BT747cmd on windows, but run_j2se.sh on Linux, bt747_macosX_j2se.command on mac): </p> <pre>BT747cmd mytextfile.nmea -f outputbasename --outtype gpx </pre> <h4><span class="mw-headline" id="GUI">GUI</span></h4> <p>Just put your source file in the 'input file box' or drag and drop multiple files to the GUI, then click on GPX. </p>    </div> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://wiki.openstreetmap.org/w/index.php?title=Converting/NMEA_to_GPX&oldid=1553073">https://wiki.openstreetmap.org/w/index.php?title=Converting/NMEA_to_GPX&oldid=1553073</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Special:Categories" title="Special:Categories">Category</a>: <ul><li><a href="/wiki/Category:Unsorted_Technical_guide" title="Category:Unsorted Technical guide">Unsorted Technical guide</a></li></ul></div></div> </div> </div> <div id="mw-navigation"> <h2>Navigation menu</h2> <div id="mw-head"> <nav id="p-personal" class="vector-menu mw-portlet mw-portlet-personal vector-user-menu-legacy" aria-labelledby="p-personal-label" role="navigation" > <h3 id="p-personal-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">Personal tools</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"><li id="pt-uls" class="mw-list-item active"><a class="uls-trigger" href="#"><span>English</span></a></li><li id="pt-createaccount" class="mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=Converting%2FNMEA+to+GPX" title="You are encouraged to create an account and log in; however, it is not mandatory"><span>Create account</span></a></li><li id="pt-login" class="mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=Converting%2FNMEA+to+GPX" title="You are encouraged to log in; however, it is not mandatory [o]" accesskey="o"><span>Log in</span></a></li></ul> </div> </nav> <div id="left-navigation"> <nav id="p-namespaces" class="vector-menu mw-portlet mw-portlet-namespaces vector-menu-tabs vector-menu-tabs-legacy" aria-labelledby="p-namespaces-label" role="navigation" > <h3 id="p-namespaces-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">Namespaces</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"><li id="ca-nstab-main" class="selected mw-list-item"><a href="/wiki/Converting/NMEA_to_GPX" title="View the content page [c]" accesskey="c"><span>Page</span></a></li><li id="ca-talk" class="new mw-list-item"><a href="/w/index.php?title=Talk:Converting/NMEA_to_GPX&action=edit&redlink=1" rel="discussion" title="Discussion about the content page (page does not exist) [t]" accesskey="t"><span>Discussion</span></a></li></ul> </div> </nav> <nav id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet vector-menu-dropdown" aria-labelledby="p-variants-label" role="navigation" > <input type="checkbox" id="p-variants-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-variants" class="vector-menu-checkbox" aria-labelledby="p-variants-label" /> <label id="p-variants-label" aria-label="Change language variant" class="vector-menu-heading " > <span class="vector-menu-heading-label">English</span> </label> <div class="vector-menu-content"> <ul class="vector-menu-content-list"></ul> </div> </nav> </div> <div id="right-navigation"> <nav id="p-views" class="vector-menu mw-portlet mw-portlet-views vector-menu-tabs vector-menu-tabs-legacy" aria-labelledby="p-views-label" role="navigation" > <h3 id="p-views-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">Views</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"><li id="ca-view" class="selected mw-list-item"><a href="/wiki/Converting/NMEA_to_GPX"><span>Read</span></a></li><li id="ca-viewsource" class="mw-list-item"><a href="/w/index.php?title=Converting/NMEA_to_GPX&action=edit" title="This page is protected.
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