Support of TMS

[IGNF-Xavier]

Description

I would like to request adding support oF TMS for basemap in the mapviewer of the datas

Motivation

During Geocom, it was said that OSM will use TMS instead of WMTS
Moreover it will allow the owner of the datahub to propose the appropriate style of this TMS.

[jahow]

So this PR adds support for vector tile layers as basemap: #1073

But I realize now (after talking to @mmohadIGN) that some of us misunderstood the need here because this does not allow adding a TMS layer using image tiles. I mean, you can specify a tiled image using the xyz type, but you can't give it an object like so:

{
  type: 'tms',
  url: 'https://data.gpf.fr/tms/1.0.0/',
  name: 'PLAN.IGN'
}

@IGNF-Xavier could you please clarify whether the current state is enough for you?

[IGNF-Xavier]

Hello,
ROK4 - the software used for delivering WMTS and TMS - has a bug which has for consequences to display in the Getcapabilities of TMS (https://data.geopf.fr/tms/1.0.0/) the endpoints of WMTS and TMS.

It will be solved in a few weeks (the correction is in qualification environment) and you will have only TMS layers like PLAN.IGN : https://data.geopf.fr/tms/1.0.0/PLAN.IGN/ in which you can fin Mbstyles Json.

There is two ways to develop the support of TMS ( #910) :

• n°1 : Use of the Mbstyles in the metadata
• n°2 : Use of the Mbstyles in the getcapabilities

I think n°2 is the best way for the support of the TMS. Probably also for basemap if the end-user is allowed to change the style of basemap.

[jahow]

Moving this to 2.4.1 because we need to implement TMS protocol in ogc-client