var tileSources =  [ //grepmeaway
"osd_41_3.dzi",
"osd_40_3.dzi",
"osd_39_3.dzi",
"osd_37_3.dzi",
"osd_36_3.dzi",
"osd_35_3.dzi",
"osd_34_3.dzi",
"osd_33_3.dzi",
"osd_32_3.dzi",
"osd_31_3.dzi",
"osd_30_3.dzi",
"osd_29_3.dzi",
"osd_28_3.dzi",
"osd_27_3.dzi",
"osd_26_3.dzi",
"osd_25_3.dzi",
"osd_24_3.dzi",
"osd_23_3.dzi",
"osd_22_3.dzi",
"osd_21_3.dzi",
"osd_20_3.dzi",
"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_12_3.dzi",
"osd_11_3.dzi",
"osd_8_3.dzi",
"osd_6_3.dzi",
"osd_5_3.dzi",
"osd_4_3.dzi",
"osd_3_3.dzi",
"osd_1_3.dzi",
]; //grepmeaway