@misc{indiciaec04bb783fbda,
  title = {Gulf of Mexico region — Highlighting low-lying areas derived from USGS Digital Elevation Data},
  author = {John J. Kosovich},
  year = {2008},
  doi = {10.3133/sim3048},
  url = {https://pubs.usgs.gov/publication/sim3048},
  note = {Source identifier: sim3048}
}