let m_mono = new L.tileLayer("https://tile.mierune.co.jp/mierune_mono/{z}/{x}/{y}.png", {
attribution: "Maptiles by <ahref='http://mierune.co.jp/'target='_blank'>MIERUNE</a>, under CC BY. Data by <ahref='http://osm.org/copyright'target='_blank'>OpenStreetMap</a> contributors, under ODbL."
let m_mono = new L.tileLayer("https://tile.mierune.co.jp/mierune_mono/{z}/{x}/{y}.png", {
attribution: "Maptiles by <ahref='http://mierune.co.jp/'target='_blank'>MIERUNE</a>, under CC BY. Data by <ahref='http://osm.org/copyright'target='_blank'>OpenStreetMap</a> contributors, under ODbL."