Create fake timestamps for GPX-files. Useful for debugging or creating anonymized tracks
GPL-3.0 License
Create timestamps for every trackpoint in a GPX file.
yarn add @mikaello/gpxfaketimer
import { createTimestampsEvenly } from "@mikaello/gpxfaketimer";
const exampleGpx = `
<?xml version="1.0" encoding="UTF-8"?>
<gpx xmlns="http://www.topografix.com/GPX/1/1" version="1.0">
<name>Example gpx</name>
<trk>
<name>Example gpx</name>
<number>1</number>
<trkseg>
<trkpt lat="46.57608333" lon="8.89241667">
<ele>2376</ele>
</trkpt>
<trkpt lat="46.57619444" lon="8.89252778">
<ele>2375</ele>
</trkpt>
<trkpt lat="46.57661111" lon="8.89344444">
<ele>2376</ele>
</trkpt>
</trkseg>
</trk>
</gpx>
`;
console.log(createTimestampsEvenly(exampleGpx, 0, 100000));
// => will return the same GPX file, only with <time>date here</time> inside every trkpt:
/*
<?xml version="1.0" encoding="UTF-8"?>
<gpx xmlns="http://www.topografix.com/GPX/1/1" version="1.0">
<name>Example gpx</name>
<trk>
<name>Example gpx</name>
<number>1</number>
<trkseg>
<trkpt lat="46.57608333" lon="8.89241667">
<ele>2376</ele>
<time>1970-01-01T00:00:00.000Z</time>
</trkpt>
<trkpt lat="46.57619444" lon="8.89252778">
<ele>2375</ele>
<time>1970-01-01T00:00:50.000Z</time>
</trkpt>
<trkpt lat="46.57661111" lon="8.89344444">
<ele>2376</ele>
<time>1970-01-01T00:01:40.000Z</time>
</trkpt>
</trkseg>
</trk>
</gpx>
*/
createTimestampsEvenly(gpxContent: string, startTime: number, endTime: number) => string
:gpxContent
enriched with timestamps in every trkpt
startTime
and endTime
are milliseconds since epoch.Not specific for GPX, but just as helper functions
getUniformDistribution(count: number, intervalStart: number, intervalEnd: number) => number[]
:
returns an array of length count
with first element intervalStart
and last
element intervalEnd
, all elements in between is evenly distributed between
these extremeties.
You can use the ./example project to ease developing. If you run
yarn start
from that folder, you will start a server running a small
application which loads the code from this module. Run yarn dev
in another
terminal to start to continously watch the code and recompile (and reload
server) when any code changes.
Contributions are welcome :-)