Elevation 1" arc

[routeconverter]

My setup (default) is "automatic" for the elevation data, and it seems to be SRTM3 (3" arc) by default.

How to enable SRTM1 (if I choose this option, nothing change...).

Automatic tries to use SRTM 1 first and falls back to these services

           PRIORITY.put("Jonathan de Ferranti DEM 1", 1);
           PRIORITY.put("NASA SRTM 1", 2);
           PRIORITY.put(J"Jonathan de Ferranti DEM 3", 3);
           PRIORITY.put("NASA SRTM 3", 4);
           PRIORITY.put("GeoNames", 5);
           PRIORITY.put("Google Maps", 6);

If nothing is found, it tries to download SRTM 3 files.

So if you choose SRTM 1 then you should get the 1" arc data after a download (see Extras/Downloads)