var tileSources =  [ //grepmeaway
"osd_27_3.dzi",
"osd_25_3.dzi",
"osd_24_3.dzi",
"osd_23_3.dzi",
"osd_21_3.dzi",
"osd_20_3.dzi",
"osd_18_3.dzi",
"osd_17_3.dzi",
"osd_16_3.dzi",
"osd_15_3.dzi",
"osd_14_3.dzi",
"osd_11_3.dzi",
"osd_10_3.dzi",
"osd_8_3.dzi",
"osd_7_3.dzi",
"osd_6_3.dzi",
"osd_5_3.dzi",
"osd_4_3.dzi",
"osd_0_3.dzi",
]; //grepmeaway