This map shows a bunch of OGC API - Tiles layers (e.g.: map tiles, vector tiles). They are easily integrated, using the OpenLayers library, which supports the standard out-of-the-box using the OGCMapTile and OGCVectorTile classes (see code sample bellow).
layers: [
new TileLayer({
source: new OGCMapTile({
url: 'https://maps.gnosis.earth/ogcapi/collections/blueMarble/map/tiles/WebMercatorQuad',
}),
}),
new VectorTileLayer({
source: new OGCVectorTile({
url: 'https://maps.gnosis.earth/ogcapi/collections/NaturalEarth:cultural:' +
'ne_10m_admin_0_countries/tiles/WebMercatorQuad',
format: new MVT(),
})
})
]