var tileSources =  [ //grepmeaway
"osd_43_3.dzi",
"osd_42_3.dzi",
"osd_41_3.dzi",
"osd_40_3.dzi",
"osd_39_3.dzi",
"osd_38_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_21_3.dzi",
"osd_20_3.dzi",
"osd_17_3.dzi",
"osd_15_3.dzi",
"osd_13_3.dzi",
"osd_9_3.dzi",
"osd_8_3.dzi",
"osd_7_3.dzi",
"osd_6_3.dzi",
"osd_5_3.dzi",
"osd_3_3.dzi",
"osd_2_3.dzi",
"osd_0_3.dzi",
]; //grepmeaway