{"title":"Dima Kogan","link":[{"@attributes":{"href":"http:\/\/notes.secretsauce.netindex.xml","rel":"self"}},{"@attributes":{"href":"http:\/\/notes.secretsauce.net"}}],"updated":"2014-07-25T17:34:00Z","id":"http:\/\/notes.secretsauce.netindex.xml","entry":[{"title":"Simple gpx export from ridewithgps","author":{"name":"Dima Kogan"},"link":{"@attributes":{"href":"http:\/\/notes.secretsauce.net\/notes\/2026\/04\/04_simple-gpx-export-from-ridewithgps.html"}},"updated":"2026-04-04T17:21:00Z","published":"2026-04-04T17:21:00Z","id":"notes\/2026\/04\/04_simple-gpx-export-from-ridewithgps.html","category":[{"@attributes":{"scheme":"\/tags\/tools.html","term":"tools","label":"tools"}},{"@attributes":{"scheme":"\/tags\/data.html","term":"data","label":"data"}},{"@attributes":{"scheme":"\/tags\/gis.html","term":"GIS","label":"GIS"}},{"@attributes":{"scheme":"\/tags\/bike.html","term":"bike","label":"bike"}}],"content":"

\nThe Tour de Los Padres<\/a> is coming! The race organizer post the route on\nridewithgps<\/a>. This works, but has convoluted interfaces for people not wanting to\nuse their service. I just wrote a simple script to export their data into a\nplain .gpx file, including<\/i> all the waypoints; their exporter omits those.\n<\/p>\n\n

\nI've seen two flavors of their data, so here're two flavors of the\ngpx-from-ridewithgps.py<\/code> script:\n<\/p>\n\n

\n\n
#<\/span>!\/usr\/bin\/python3<\/span>\nimport<\/span> sys\nimport<\/span> json\n\ndef<\/span> quote_xml<\/span>(s):\n    return<\/span> s.replace(\"&\"<\/span>, \"&amp;\"<\/span>).replace(\"<\"<\/span>, \"&lt;\"<\/span>).replace(\">\"<\/span>, \"&gt;\"<\/span>)\n\nprint<\/span>(\"Reading stdin\"<\/span>, file<\/span>=sys.stderr)\ndata<\/span> = json.load(sys.stdin)\n\nprint<\/span>(r\"\"\"<?xml version=\"1.0\" encoding=\"UTF-8\"?><\/span>\n<gpx version=\"1.1\" creator=\"gpx-from-ridewithgps.py\" xmlns=\"http:\/\/www.topografix.com\/GPX\/1\/1\">\"\"\"<\/span>)\n\nfor<\/span> item in<\/span> data[\"extras\"<\/span>]:\n    if<\/span> item[\"type\"<\/span>] != \"point_of_interest\"<\/span>:\n        continue<\/span>\n    poi<\/span> = item[\"point_of_interest\"<\/span>]\n    print<\/span>(f'  <wpt lat=\"{poi[\"lat\"]}\" lon=\"{poi[\"lng\"]}\">'<\/span>)\n    print<\/span>(f'    <name>{quote_xml(poi[\"name\"])}<\/name>'<\/span>)\n\n    desc<\/span> = poi.get(\"description\"<\/span>,\"\"<\/span>)\n    if<\/span> len<\/span>(desc):\n        print<\/span>(f'    <desc>{quote_xml(desc)}<\/desc>'<\/span>)\n    print<\/span>(f'  <\/wpt>'<\/span>)\n\nprint<\/span>(\"  <trk><trkseg>\"<\/span>)\nfor<\/span> pt in<\/span> data.get(\"route\"<\/span>, {}).get(\"track_points\"<\/span>, []):\n    print<\/span>(f'    <trkpt lat=\"{pt[\"y\"]}\" lon=\"{pt[\"x\"]}\"><ele>{pt[\"e\"]}<\/ele><\/trkpt>'<\/span>)\nprint<\/span>(\"  <\/trkseg><\/trk>\"<\/span>)\n\nprint<\/span>(\"<\/gpx>\"<\/span>)\n<\/pre>\n<\/div>\n\n
\n\n
#<\/span>!\/usr\/bin\/python3<\/span>\nimport<\/span> sys\nimport<\/span> json\n\ndef<\/span> quote_xml<\/span>(s):\n    return<\/span> s.replace(\"&\"<\/span>, \"&amp;\"<\/span>).replace(\"<\"<\/span>, \"&lt;\"<\/span>).replace(\">\"<\/span>, \"&gt;\"<\/span>)\n\nprint<\/span>(\"Reading stdin\"<\/span>, file<\/span>=sys.stderr)\ndata<\/span> = json.load(sys.stdin)\n\nprint<\/span>(r\"\"\"<?xml version=\"1.0\" encoding=\"UTF-8\"?><\/span>\n<gpx version=\"1.1\" creator=\"gpx-from-ridewithgps.py\" xmlns=\"http:\/\/www.topografix.com\/GPX\/1\/1\">\"\"\"<\/span>)\n\nfor<\/span> poi in<\/span> data[\"points_of_interest\"<\/span>]:\n    print<\/span>(f'  <wpt lat=\"{poi[\"lat\"]}\" lon=\"{poi[\"lng\"]}\">'<\/span>)\n    print<\/span>(f'    <name>{quote_xml(poi[\"name\"])}<\/name>'<\/span>)\n\n    desc<\/span> = poi.get(\"description\"<\/span>,\"\"<\/span>)\n    if<\/span> len<\/span>(desc):\n        print<\/span>(f'    <desc>{quote_xml(desc)}<\/desc>'<\/span>)\n    print<\/span>(f'  <\/wpt>'<\/span>)\n\nfor<\/span> poi in<\/span> data[\"course_points\"<\/span>]:\n    print<\/span>(f'  <wpt lat=\"{poi[\"y\"]}\" lon=\"{poi[\"x\"]}\">'<\/span>)\n    print<\/span>(f'    <name>{quote_xml(poi[\"n\"])}<\/name>'<\/span>)\n    print<\/span>(f'  <\/wpt>'<\/span>)\n\nprint<\/span>(\"  <trk><trkseg>\"<\/span>)\nfor<\/span> pt in<\/span> data['track_points'<\/span>]:\n    print<\/span>(f'    <trkpt lat=\"{pt[\"y\"]}\" lon=\"{pt[\"x\"]}\"><ele>{pt[\"e\"]}<\/ele><\/trkpt>'<\/span>)\nprint<\/span>(\"  <\/trkseg><\/trk>\"<\/span>)\n\nprint<\/span>(\"<\/gpx>\"<\/span>)\n<\/pre>\n<\/div>\n\n
\nYou invoke it by downloading the route and feeding it into the script:\n<\/p>\n\n
\n\n
curl -s https:\/\/ridewithgps.com\/routes\/54493422.json | .\/ridewithgps-to-gpx.py > out.gpx\n<\/pre>\n<\/div>\n\n
\nNote that the route number 54493422 is in the url above.<\/p>\n"},{"title":"mrcal 2.5 released!","author":{"name":"Dima Kogan"},"link":{"@attributes":{"href":"http:\/\/notes.secretsauce.net\/notes\/2026\/01\/18_mrcal-25-released.html"}},"updated":"2026-01-18T16:00:00Z","published":"2026-01-18T16:00:00Z","id":"notes\/2026\/01\/18_mrcal-25-released.html","category":{"@attributes":{"scheme":"\/tags\/mrcal.html","term":"mrcal","label":"mrcal"}},"content":"
\nmrcal<\/a> 2.5 is out: the release notes<\/a>. Once again<\/i>, this is mostly a bug-fix\nrelease en route to the big new features coming in 3.0.\n<\/p>\n\n
\nOne cool thing is that these tools have now matured enough to no longer be\nconsidered experimental. They have been used with great success in lots<\/i> of\ncontexts across many different projects and organizations. Some highlights:\n<\/p>\n\n