fiery sunset, San Francisco
fiery sunset, San Francisco
latmax: 66.02500,latmin: -41.28646, lonmax: 177.435623 lonmin: -179.981344
avlat: 37.8058666425 , avlon: -19.6553170606
latcentre:12.36927, loncentre: -1.2728605
hypot: 373.179096074 uses open street maps with leaflet.js and marketcluster plug
https://github.com/Leaflet/Leaflet.markercluster