reef    elevation    exposure_percent  avg_vertical_change  lat         lon          
1S5     -0.19        34.4              47.16923077          34.69782    -76.61442    
1S6     -0.29        24.02             71.12820513          34.69881    -76.61681    
1S75    -0.4686      6.94              -6.714622642         34.69725    -76.61562    
1S9     -0.6798      0.3               32.28183962          34.69651    -76.61777    
2S5     -0.1994      33.39             31.73913043          34.68794    -76.61888    
2S6     -0.3662      15.6              64.23395445          34.6882     -76.61971    
2S75    -0.48        6.29              -4.609730849         34.68835    -76.6206     
2S9     -0.667       0.3               -0.83126294          34.68898    -76.62192    
3S5     -0.2166      31.32             41.90880829          34.68428    -76.61439    
3S6     -0.3286      19.91             -7.262176166         34.68385    -76.61428    
3S75    -0.4924      5.65              -19.44145078         34.68238    -76.61425    
3S9     -0.5558      2.31              -13.91917098         34.68262    -76.61448    
4S5     -0.2238      31.32             91.06185567          34.6855     -76.61252    
4S6     -0.2992      22.9              56.38561321          34.68478    -76.61242    
4S75    -0.5174      3.87              -4.5625              34.68414    -76.61168    
4S9     -0.689       0.27              28.22164948          34.68428    -76.61246