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OSM GPX extractor for non experts

Käyttäjä pangoSE kirjotti tämän 13. Februarya 2020 kielellä English Last updated on 23. Junea 2020.

Hi. During my engagement in swedish hiking groups I became aware of the need for a service for extracting GPX-files with huts and shelters to put into GPS-devices and phones.

I built a simple website to fill this need which was a fun and learning experience :)

Try it out here: https://pangose.github.io/gpx-extractor/ Code: https://github.com/pangoSE/gpx-extractor

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Discussion

Kommentti käyttäjältä mmd 13. February 2020 klo 21.27

I believe one of your example queries does not return any geometry information for ways, i.e. you’re probably missing out a few thousand objects. Maybe try this one here: https://overpass-turbo.eu/s/QHD

Kommentti käyttäjältä pangoSE 14. February 2020 klo 10.03

Hi mmd, which query do you mean?

This is the function that builds the query: function buildQuery(areaCode) { var q = ‘https://overpass-api.de/api/interpreter?data=[out:xml][timeout:325];area(‘+areaCode+’)->.searchArea;’+query+’out;’;

I decided not to add “center” after out because it does not seem to be necessary and make the query time much longer. togpx() handles the data like this: “Points are converted to Waypoints. Lines are converted to Tracks. (Multi)Polygons are represented as a Track of their outline(s).” see https://github.com/tyrasd/togpx

I don’t know how this looks on a GPS-device because I don’t own one.

Kommentti käyttäjältä mmd 14. February 2020 klo 10.10

Query was the second one “huts, shelters, shalets, … “. In your query you use “nwr” which returns nodes, ways, and relations. However, for the ways, you only receive the “node ids”, not the actual nodes with lat/lon details.

togpx cannot create anything meaningful in this case, as there’s simply no geoemtry available. Please compare:

  • way(34996405)[tourism=chalet];out;
  • way(34996405)[tourism=chalet];out center;

Kommentti käyttäjältä H@mlet 14. February 2020 klo 12.33

When I search for “Brittany”, it finds Q327, which is the historical entity and has no OSM relation ID, as it doesn’t exists anymore.

The correct result would be Q12130 which has the correct relation ID.

Regards.

Kommentti käyttäjältä H@mlet 14. February 2020 klo 12.39

Otherwise it worked quite well with area “ Sweden “, with Firefox mobile 68.5.0 and osmand.

Kommentti käyttäjältä pangoSE 14. February 2020 klo 20.57

Hi Hamlet. Have a look on WP:Brittany. It says: “This article is about the cultural region in the north-west of France. For the current French administrative region, see Brittany (administrative region).”

So in this case “Brittany (administrative region)” should work in your case as it is linked with Q12130.

Kommentti käyttäjältä pangoSE 14. February 2020 klo 20.58

@mmd Thank you! Now I understand. I will add center to all queries then. :)

Kommentti käyttäjältä H@mlet 14. February 2020 klo 23.01

Right, it’s a bit cumbersome, but it works ! :-)

You might want to add some kind of completion, looking for wikidata items with OSM IDs, because when I tried, your tool asked me to change the first item, which was confusing.

Anyway thanks for your tool. You could add a “water” section, I like to have drinking_water, toilets and such highlighted on my maps.

Regards.

Kommentti käyttäjältä pangoSE 16. February 2020 klo 10.59

I now added jQuery Autocomplete from the Wikipedia API. I’m quite happy with the result! :)

Kommentti käyttäjältä pangoSE 19. February 2020 klo 22.06

Code is now at https://github.com/pangoSE/gpx-extractor MIT license. Feel free to create issues with ideas for improvements or bugs.

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