var tileSources =  [ //grepmeaway
"osd_19_3.dzi",
"osd_18_3.dzi",
"osd_17_3.dzi",
"osd_16_3.dzi",
"osd_15_3.dzi",
"osd_14_3.dzi",
"osd_9_3.dzi",
"osd_7_3.dzi",
"osd_5_3.dzi",
"osd_4_3.dzi",
"osd_3_3.dzi",
"osd_2_3.dzi",
"osd_0_3.dzi",
]; //grepmeaway