In the United States, the forest cover by state and territory is estimated from tree-attributes using the basic statistics reported by the Forest Inventory and Analysis (FIA) program of the Forest Service.[2] Tree volumes and weights are not directly measured in the field, but computed from other variables that can be measured.[3][4]
This is only the total amount of timberland. Actual forest cover for each state may be significantly higher.[5][1]
^There is a forest on Palmyra Atoll,[7] but there is no information about what percentage of land the forest covers.
^The U.S. territories are American Samoa, Guam, Northern Mariana Islands, Puerto Rico and U.S. Virgin Islands. The U.S. Minor Outlying Islands are not counted.
^The FIA defines the Southern region of the U.S. as Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, and Virginia.
^The FIA defines the Pacific Northwest region as Alaska, California, Hawaii, Oregon, and Washington.
^The FIA defines the Northern region of the U.S. as Connecticut, Delaware, Illinois, Indiana, Iowa, Kansas, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Dakota, Ohio, Pennsylvania, Rhode Island, South Dakota, Vermont, West Virginia and Wisconsin. The District of Columbia is not counted.
^The FIA defines the Interior West region of the U.S. as Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming.
