A description of each variable can be found in the BBIRD protocol

CompNID
NID
Nsttype
Dbh_cm
Ovrcov
SC1
SC2
SC3
SC4
Littr_mm
Gcgrn
Gcgrass
Gcngrass
Gcsedge
Gcforb
Gcshrub
Gcfern
Gcmoss
Gccactus
Gclog
Gcwater
Gcbare
Gcrock
Gcleaf
Gcbrush
Gcmarsh
Aspect_d
Slope_d
Topcan_m
Hcanopy
Cancov
Cdomsp1
Cdomsp1p
Cdomsp2
Cdomsp2p
M11snag1
M11snag2
RobNstN
RobNstE
RobNstS
RobNstW
Rob1mN
Rob1mE
Rob1mS
Rob1mW
Rob3mN
Rob3mE
Rob3mS
Rob3mW
Rob5mN
Rob5mE
Rob5mS
Rob5mW
GrHtNst
GrHt1mN
GrHt1mE
GrHt1mS
GrHt1mW
GrHt3mN
GrHt3mE
GrHt3mS
GrHt3mW
GrHt5mN
GrHt5mE
GrHt5mS
GrHt5mW
GrTotCov