The following regions are regional areas composed of VEMAP .5 degree
grid cells within the VEMAP area .

Appalachians
California
Central Great Plains
Eastern Midwest
Gulf Coast
Great Lakes
Mid-Atlantic
Metro East Coast
New England
Northern Great Plains
Pacific Northwest
Rocky Mountains + Great Basin
Southern Great Plains + SW II
South Atlantic + Carribean
Southeast
Southwest I
 
 

The following watersheds are watershed areas composed of VEMAP .5 degree
grid cells within the VEMAP area .

HUC1 (New England)
HUC2 (Mid Atlantic)
HUC3 (South Atlantic-Gulf)
HUC4 (Great Lakes)
HUC5 (Ohio)
HUC6 (Tennessee)
HUC7 (Upper Mississippi)
HUC8 (Lower Mississippi)
HUC9 (Souris-Red-Rainy)
HUC10 (Missouri)
HUC11 (Arkansas-White-Red)
HUC12 (Texas-Gulf)
HUC13 (Rio Grande)
HUC14 (Upper Colorado)
HUC15 (Lower Colorado)
HUC16 (Great Basin)
HUC17 (Pacific Northwest)
HUC18 (California)