var tileSources =  [ //grepmeaway
"osd_49_3.dzi",
"osd_48_3.dzi",
"osd_47_3.dzi",
"osd_45_3.dzi",
"osd_44_3.dzi",
"osd_42_3.dzi",
"osd_41_3.dzi",
"osd_40_3.dzi",
"osd_39_3.dzi",
"osd_38_3.dzi",
"osd_37_3.dzi",
"osd_36_3.dzi",
"osd_35_3.dzi",
"osd_18_3.dzi",
"osd_17_3.dzi",
"osd_16_3.dzi",
"osd_15_3.dzi",
"osd_14_3.dzi",
"osd_13_3.dzi",
"osd_12_3.dzi",
"osd_9_3.dzi",
"osd_8_3.dzi",
"osd_7_3.dzi",
"osd_6_3.dzi",
"osd_5_3.dzi",
"osd_4_3.dzi",
"osd_3_3.dzi",
"osd_2_3.dzi",
"osd_1_3.dzi",
"osd_0_3.dzi",
]; //grepmeaway