easting,northing,name,elevation
50,10,end,0
150,10,after_backreef,0
212.5,10,qtr_crest(50),0
225,10,half_crest(50),0
237.5,10,3qtr_crest(50),0
262.5,10,qtr_crest(250),0
325,10,half_crest(250),0
387.5,10,3qtr_crest(250),0
312.5,10,qtr_crest(450),0
425,10,half_crest(450),0
537.5,10,3qtr_crest(450),0
362.5,10,qtr_crest(650),0
525,10,half_crest(650),0
687.5,10,3qtr_crest(650),0
320,10,before_crest(50),0
520,10,before_crest(250),0
720,10,before_crest(450),0
920,10,before_crest(650),0
530,10,start(50),0
730,10,start(250),0
930,10,start(450),0
1130,10,start(650),0