Figure 4 graphic for NPPSD
![Map of seabird survey observations from 1973 - 1982 used to create the first pelagic seabird database. Cells are 50 × 50 km](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/NPPSD-73-82_Map_cropA.jpg?itok=eiqaBblm)
Detailed Description
Map showing area sampled during time periods 1973–1982. Cells are 50 × 50 km. Seabird survey observations from 1973 - 1982 used to create the first pelagic seabird database.
Sources/Usage
Public Domain.
U.S. Geological Survey