var tileSources =  [ //grepmeaway
"osd_43_3.dzi",
"osd_42_3.dzi",
"osd_41_3.dzi",
"osd_39_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_29_3.dzi",
"osd_27_3.dzi",
"osd_26_3.dzi",
"osd_25_3.dzi",
"osd_24_3.dzi",
"osd_23_3.dzi",
]; //grepmeaway