2018/8/11 14
retroscope
<br/>var map = L.map("map").setView([35.671872, 139.754969], 18);<br/>L.tileLayer("https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png", {<br/>attribution: "© <a href='http://osm.org/copyright'>OpenStreetMap</a> contributors"<br/>}).addTo(map);<br/>var layer = L.tileLayer.mask("https://cyberjapandata.gsi.go.jp/xyz/seamlessphoto/{z}/{x}/{y}.jpg", {<br/>attribution: "<a href='http://maps.gsi.go.jp/development/ichiran.html'>地理院タイル</a>"<br/>}).addTo(map);<br/>map.on("mousemove", function(event) {<br/>layer.setCenter(event.containerPoint);<br/>});<br/>