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title: FAQ
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# { title }

### Do I need to donate to use the website?

No.
The website is free to use and always will be (as long as it is financially sustainable).
However, donations are appreciated and help keep the website running.

### Why is this route chosen over that one? _Or_ how can I add something to the map?

**gpx.studio** utilizza i dati di <a href="https://www.openstreetmap.org/" target="_blank">OpenStreetMap</a>, che è una mappa del mondo aperta e collaborativa.
This means you can contribute to the map by adding or editing data on OpenStreetMap.

Se non hai mai contribuito a OpenStreetMap prima, ecco come puoi suggerire delle modifiche:

1. Go to the location where you want to add or edit data on the <a href="https://www.openstreetmap.org/" target="_blank">map</a>.
2. Use the <button>Query features</button> tool on the right to inspect the existing data.
3. Right-click on the location and select <button>Add a note here</button>.
4. Explain what is incorrect or missing in the note and click <button>Add note</button> to submit it.

Qualcuno più esperto con OpenStreetMap passerà in rassegna la tua nota e apporterà le modifiche necessarie.

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More information on how to contribute to OpenStreetMap can be found <a href="https://wiki.openstreetmap.org/wiki/How_to_contribute" target="_blank">here</a>.

</DocsNote>

### Why is the elevation profile for my GPX file empty?

If the elevation profile for your GPX file is empty, it means that the GPX file does not contain elevation data.
You can add elevation data to your GPX file by using <a href="https://www.gpsvisualizer.com/elevation" target="_blank">GPS Visualizer</a>.
