Locations at which to predict sulfate atmospheric deposition in the conterminous USA.
sulfate_preds
An sf
object with 197 rows and 1 column.
geometry: POINT
geometry representing coordinates in a
Conus Albers projection (EPSG: 5070).
Zimmerman, D.L. (1994). Statistical analysis of spatial data. Pages 375-402 in Statistical Methods for Physical Science, J. Stanford and S. Vardeman (eds.), Academic Press: New York.