Map Raster Tile Rendering - front development FIND COORDINATE! Base Function Find a world degree and wgs84 coordinate by using marker(Just click!) Mouse Wheel : Map Zoom In / Out Mouse Drag : Map Moving Bug After Zoom in / out, cursor and marker position unstable. After side render, tile cache and position are a little twisted. There are some problem about tile image render cache and timing. Bug is fixing.... ES5 -> ES6 is porting.... (Babel, polyfill, webpack) Exmaple site : https://map.songwon.me