//篩選同一分鐘內的數據,只取一條
var zb_wb = (from a in list_pos
from b in list_wb
where b.YCWHJL_QSSJ.Value.ToString("yyMMddHHmm") == a.Time.ToString("yyMMddHHmm")
select new
{
pos=a.Latitude+","+a.Longitude,
time = a.Time.ToString("yyMMddHHmm")
}).GroupBy(x => x.time).Select(x=>x.First()).ToList();