下面是 Y坐标相同的分到一组
 - (setq lst (mapcar '(lambda(x)(cons (cadar x) x)) a))
- (setq lst (xd::list:groupbyindex lst 0.01))
- (setq lst (mapcar 'cdr lst))
((((54310.4 -106282.0 0.0) "高程点" "图层")
((54310.4 -106282.0 0.0) "高程点" "图层")
((54310.4 -106282.0 0.0) "高程点" "图层")
)
(((97641.1 -108326.0 0.0) "高程点" "图层")
((97641.1 -108326.0 0.0) "高程点" "图层")
((97641.1 -108326.0 0.0) "高程点" "图层")
)
(((54310.4 -46991.6 0.0) "高程点" "图层")
((54310.4 -46991.6 0.0) "高程点" "图层")
((54310.4 -46991.6 0.0) "高程点" "图层")
)
(((97641.1 -49035.1 0.0) "高程点" "图层")
((97641.1 -49035.1 0.0) "高程点" "图层")
((97641.1 -49035.1 0.0) "高程点" "图层")
)
(((398913.0 10842.4 0.0) "高程点" "图层")
((398913.0 10842.4 0.0) "高程点" "图层")
((398913.0 10842.4 0.0) "高程点" "图层")
((54310.4 10842.4 0.0) "高程点" "图层")
((54310.4 10842.4 0.0) "高程点" "图层")
((54310.4 10842.4 0.0) "高程点" "图层")
)
(((541877.0 2795.04 0.0) "高程点" "图层")
((541877.0 2795.04 0.0) "高程点" "图层")
((541877.0 2795.04 0.0) "高程点" "图层")
((197274.0 2795.04 0.0) "高程点" "图层")
((197274.0 2795.04 0.0) "高程点" "图层")
((197274.0 2795.04 0.0) "高程点" "图层")
)
(((447400.0 38042.7 0.0) "高程点" "图层")
((447400.0 38042.7 0.0) "高程点" "图层")
((447400.0 38042.7 0.0) "高程点" "图层")
((102797.0 38042.7 0.0) "高程点" "图层")
((102797.0 38042.7 0.0) "高程点" "图层")
((102797.0 38042.7 0.0) "高程点" "图层")
)
(((405636.0 38930.7 0.0) "高程点" "图层")
((405636.0 38930.7 0.0) "高程点" "图层")
((405636.0 38930.7 0.0) "高程点" "图层")
((61033.2 38930.7 0.0) "高程点" "图层")
((61033.2 38930.7 0.0) "高程点" "图层")
((61033.2 38930.7 0.0) "高程点" "图层")
)
(((498546.0 4838.52 0.0) "高程点" "图层")
((498546.0 4838.52 0.0) "高程点" "图层")
((498546.0 4838.52 0.0) "高程点" "图层")
((153944.0 4838.52 0.0) "高程点" "图层")
((153944.0 4838.52 0.0) "高程点" "图层")
((153944.0 4838.52 0.0) "高程点" "图层")
)
(((442243.0 8798.93 0.0) "高程点" "图层")
((442243.0 8798.93 0.0) "高程点" "图层")
((442243.0 8798.93 0.0) "高程点" "图层")
((97641.1 8798.93 0.0) "高程点" "图层")
((97641.1 8798.93 0.0) "高程点" "图层")
((97641.1 8798.93 0.0) "高程点" "图层")
)
)
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