Web and Tile Map Service

The custom map option supports a configuration of your external Web or Tile Map Service ( WMS/TMS).  The URL format of the custom (TMS or WMS) map service supports following parameters: {quadkey} {x} {y} {zoom}/{z} {north} {south} {east} {west}. The example TMS configuration enables topographical map for the zoom level 16 in Finland area:

http://tiles.kartat.kapsi.fi/peruskartta/{z}/{x}/{y}.jpg

WMS client supports either EPSG-4326 or EPSG-3857 coordinates. The URL of WMS could be e.g.:

http://kartta.liikennevirasto.fi/maaliikenne/wms?service=WMS&version=1.1.1&request=GetMap&SRS=EPSG:3857&format=image/png&width=256&height=256&layers=Tien+paallyste&TRANSPARENT=TRUE&BBOX={west},{south},{east},{north}

This URL enables information about the covering of the roads, like asphalt or sand.

And example about a high-res map:

http://tiles.kartat.kapsi.fi/peruskartta?FORMAT=image/jpeg&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&SRS=EPSG:4326&layers=peruskartta_01&WIDTH=768&HEIGHT=768&BBOX={west},{south},{east},{north}

If you just know the base address of the WMS, you will get the capabilities of the services into XML file by entering the following line into your web browser:

http://kartta.liikennevirasto.fi/maaliikenne/wms?service=WMS&version=1.1.1&request=GetCapabilities

Open and free web map services are listed e.g. at Spatineo Directory:

http://directory.spatineo.com/

If you want to know more about WMS check this out:

http://docs.geoserver.org/latest/en/user/services/wms/basics.html

Finally examples about GPX download links:

https://www.googleapis.com/drive/v3/files/10J3V-GIxVb3mcomk-Kq1vQoesJnI_iMO?key={apikey}&alt=media&gpx=true

https://ridewithgps.com/routes/17035109.gpx?sub_format=track&gpx=true

Latest version 1.4.9x supports GPX format of GPS Visualizer. See also map layer example.  Note! The "Get Link" action of Google Drive gives you a link, which is not a compatible download link. You have to copy the file ID part from it to the blue part of the above  template link.