Depth bounds and approximate midpoints of EN4 analysis layers. All values are in metres.

Approx midpoints dep_upp	dep_low
5.0215898	 0		10.0475
15.07854	 10.0475	20.1158
25.16046	 20.1158	30.214
35.27829	 30.214		40.3553
45.44776	 40.3553	50.5586
55.691494	 50.5586	60.8509
66.041985	 60.8509	71.2711
76.54591	 71.2711	81.8753
87.27029	 81.8753	92.7437
98.31118	 92.7437	103.9913
109.806175	 103.9913	115.7825
121.9519	 115.7825	128.3522
135.02855	 128.3522	142.0345
149.43373	 142.0345	157.3019
165.72845	 157.3019	174.8189
184.69746	 174.8189	195.5097
207.42545	 195.5097	220.6418
235.38617	 220.6418	251.9186
270.53412	 251.9186	291.5638
315.37408	 291.5638	342.3651
372.96545	 342.3651	407.6244
446.80093	 407.6244	490.9494
540.5022	 490.9494	595.8501
657.32294	 595.8501	725.1709
799.5496	 725.1709	880.5102
967.99585	 880.5102	1061.846
1161.8059	 1061.846	1267.542
1378.661	 1267.542	1494.7288
1615.2905	 1494.7288	1739.8875
1868.0707	 1739.8875	1999.4135
2133.517	 1999.4135	2270.0168
2408.5835	 2270.0168	2548.9243
2690.7803	 2548.9243	2833.926
2978.166	 2833.926	3123.3313
3269.278	 3123.3313	3415.8828
3563.0408	 3415.8828	3710.6636
3858.6763	 3710.6636	4007.0154
4155.628	 4007.0154	4304.469
4453.502	 4304.469	4602.695
4752.021	 4602.695	4901.459
5050.9897	 4901.459	5200.5986
5350.272	 5200.5986	5500