Does anyone know of an "almost always available" service URL for a public facing Web Map Tiling Service (WMTS)?
I'm keen to test WMTS client capabilities without having to configure a WMTS server.
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Take a look at:
WMTS, it will find only results that are served by that standard i.e. https://www.geoseer.net/s.php?q=wmts+OpenStreetMap
Those looking to test their web map applications against an Esri REST WMTS, please use USGS The National Map basemap services, which are published using ArcGIS Server 10.2:
Click on any of the services in this directory and you will see a 'WMTS' link in the upper left corner which points towards the getcapabilities file for that service.
An example Tile request from the 'USGSShadedReliefonly' map service: http://basemap.nationalmap.gov/arcgis/rest/services/USGSShadedReliefOnly/MapServer/WMTS/tile/1.0.0/USGSShadedReliefOnly/default/default028mm/4/7/4.jpg
You can find a public APOLLO imagery WMTS available here. You can consider this an "always on" service
The service is compliant to the OGC Team engine test suite but note;