var tileSources =  [ //grepmeaway
"osd_59_3.dzi",
"osd_58_3.dzi",
"osd_57_3.dzi",
"osd_56_3.dzi",
"osd_55_3.dzi",
"osd_53_3.dzi",
"osd_52_3.dzi",
"osd_51_3.dzi",
"osd_50_3.dzi",
"osd_49_3.dzi",
"osd_48_3.dzi",
"osd_47_3.dzi",
"osd_46_3.dzi",
"osd_45_3.dzi",
"osd_44_3.dzi",
"osd_43_3.dzi",
"osd_25_3.dzi",
"osd_24_3.dzi",
"osd_19_3.dzi",
"osd_18_3.dzi",
"osd_16_3.dzi",
"osd_15_3.dzi",
"osd_14_3.dzi",
"osd_11_3.dzi",
"osd_7_3.dzi",
"osd_6_3.dzi",
"osd_4_3.dzi",
"osd_3_3.dzi",
"osd_0_3.dzi",
]; //grepmeaway