var tileSources =  [ //grepmeaway
"osd_18_3.dzi",
"osd_17_3.dzi",
"osd_16_3.dzi",
"osd_15_3.dzi",
"osd_10_3.dzi",
"osd_9_3.dzi",
"osd_2_3.dzi",
"osd_1_3.dzi",
]; //grepmeaway