13:I[76597,["4439","static/chunks/e2799680-541c871d8bafd680.js","4035","static/chunks/4035-187f68ca241c9922.js","7648","static/chunks/7648-d4d7960e95f95a86.js","1519","static/chunks/1519-241ea71dbbd97a4d.js","9110","static/chunks/9110-d6c4c433ca4266da.js","5878","static/chunks/5878-6a906c6c6e5ebee4.js","2653","static/chunks/2653-025c4acf74a5af6c.js","1550","static/chunks/1550-c914b2d32bf6dfe6.js","3401","static/chunks/3401-83cc6d2007659617.js","783","static/chunks/app/dataset/%5Bid%5D/data/view/%5Bfileid%5D/page-0a87f9918868c0a6.js"],"default"] 14:T527,

This dataset describes a series of points along the coast of South and North America, and the alongshore distance of the path connecting those points. A species occurrence on the East Coast of North America is mapped to an alongshore distance by finding the geographic point in this coordinate system closest to the occurrence, and then assigning to the occurrence the alongshore distance associated with that geographic point.

The complete dataset methodology is detailed in Pappalardo P, Pringle J, Wares J, and J Byers (2015): The location, strength, and mechanisms behind marine biogeographic boundaries of the east coast of North America. Ecography 38: 001–010, 2015

There are two datasets associated with this coordinate system:
http://www.bco-dmo.org/dataset/554871: Database of marine invertebrate dispersal parameters and species ranges (NE Coast N. America)
and
http://www.bco-dmo.org/dataset/555322: Database of marine invertebrate dispersal parameters, species ranges and lat-lon ranges (NE Coast N. America)