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Error parsing WMTS from IGN

See original GitHub issue

Copied from Mapsui https://github.com/Mapsui/Mapsui/issues/1752

Hello,

I use Mapsui.Forms release 4.0.0-beta.5 in a Xamarin application.

The error comes when I try to parse capabilities from IGN Orthophotos layer, the WmtsParser.Parse method throw this exception :

System.ArgumentException: identifier at BruTile.Wmts.CrsUnitOfMeasureRegistry.get_Item (BruTile.Wmts.CrsIdentifier identifier)

This is the code I use :

var httpClient = new System.Net.Http.HttpClient();
var response = await httpClient.GetStreamAsync("https://wxs.ign.fr/ortho/geoportail/wmts?SERVICE=wmts&VERSION=1.0.0&REQUEST=GetCapabilities");
var tileSources = WmtsParser.Parse(response);
var ortho  = tileSources.First(t => t.Name == "ORTHOIMAGERY.ORTHOPHOTOS");
if (DefaultCache != null)
   ortho.PersistentCache = DefaultCache;
TileLayer Layer = new TileLayer(ortho) { Name = "Photos IGN" };

The same code with an other provider runs well :

var httpClient = new System.Net.Http.HttpClient();
var response = await httpClient.GetStreamAsync("https://geodata.nationaalgeoregister.nl/wmts/top10nl?VERSION=1.0.0&request=GetCapabilities");
var tileSources = WmtsParser.Parse(response);
var nature2000TileSource = tileSources.First(t => t.Name == "natura2000");
if (DefaultCache != null)
   nature2000TileSource.PersistentCache = DefaultCache;
TileLayer Layer = new TileLayer(nature2000TileSource) { Name = nature2000TileSource.Name };