var tileSources =  [ //grepmeaway
"osd_29_3.dzi",
"osd_28_3.dzi",
"osd_25_3.dzi",
"osd_23_3.dzi",
"osd_22_3.dzi",
"osd_21_3.dzi",
"osd_20_3.dzi",
"osd_19_3.dzi",
"osd_16_3.dzi",
"osd_14_3.dzi",
"osd_13_3.dzi",
"osd_12_3.dzi",
"osd_9_3.dzi",
"osd_5_3.dzi",
"osd_3_3.dzi",
]; //grepmeaway