Accommodate WMTS forms for map layers

[sharonmleon]

https://www.opengeospatial.org/standards/wmts

[jimsafley]

https://github.com/mylen/leaflet.TileLayer.WMTS

[jimsafley]

This issue isn't a blocker, per se, but it would make testing this feature much easier: alexandre-melard/leaflet.TileLayer.WMTS#24

[jimsafley]

The wmts branch introduces WMTS overlays, with behavior near-identical to the existing WMS overlays. One major caveat, however: the Leaflet plugin this uses does not work with the few WMTS services I found. In addition to not working with ArcGIS (as explained in this issue), the plugin does not work with USGS endpoints. I had to "fork" the code to make the one change necessary to make the WMTS requests work. Right now I'm not sure if the plugin follows the WMTS specification and these services don't (or vice versa), or maybe I'm completely misunderstanding things. I won't be comfortable merging this feature branch until the issue is resolved somehow.

[emmareisz]

Hi @jimsafley, WMTS support would be so useful - thanks for looking into this.
I actually couldn't get the wmts branch to load (invalid Module.php) so I couldn't test it - I don't know much about Omeka S modules so maybe I've missed something obvious? Thanks!

[jimsafley]

That's odd,. An "invalid Module.php file" error means the Module.php file is missing, is not readable, or does not extend Omeka\Module\AbstractModule. Are any of those conditions true?

[jimsafley]

See this forum post for potential leads on a functional, compliant WMTS server.