openStreetMapLayer = {
const osm = L.tileLayer('https://{s}.tile.thunderforest.com/spinal-map/{z}/{x}/{y}.png?apikey=d1921d56558744ed821907b2b1e1d642', {
attribution: '© <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map)
return osm
}