var tileSources =  [ //grepmeaway
"osd_50_3.dzi",
"osd_49_3.dzi",
"osd_48_3.dzi",
"osd_47_3.dzi",
"osd_46_3.dzi",
"osd_43_3.dzi",
"osd_42_3.dzi",
"osd_41_3.dzi",
"osd_40_3.dzi",
"osd_37_3.dzi",
"osd_35_3.dzi",
"osd_33_3.dzi",
"osd_31_3.dzi",
"osd_30_3.dzi",
"osd_29_3.dzi",
"osd_26_3.dzi",
"osd_25_3.dzi",
"osd_23_3.dzi",
"osd_17_3.dzi",
"osd_15_3.dzi",
"osd_14_3.dzi",
"osd_8_3.dzi",
"osd_5_3.dzi",
"osd_0_3.dzi",
]; //grepmeaway