var tileSources =  [ //grepmeaway
"osd_23_3.dzi",
"osd_22_3.dzi",
"osd_21_3.dzi",
"osd_20_3.dzi",
"osd_18_3.dzi",
"osd_17_3.dzi",
"osd_14_3.dzi",
"osd_13_3.dzi",
]; //grepmeaway