var tileSources =  [ //grepmeaway
"osd_57_3.dzi",
"osd_56_3.dzi",
"osd_55_3.dzi",
"osd_54_3.dzi",
"osd_52_3.dzi",
"osd_51_3.dzi",
"osd_50_3.dzi",
"osd_49_3.dzi",
"osd_48_3.dzi",
"osd_45_3.dzi",
"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_37_3.dzi",
"osd_36_3.dzi",
"osd_34_3.dzi",
"osd_33_3.dzi",
"osd_32_3.dzi",
"osd_31_3.dzi",
"osd_30_3.dzi",
"osd_3_3.dzi",
"osd_2_3.dzi",
"osd_1_3.dzi",
"osd_0_3.dzi",
]; //grepmeaway