oregon.env.vars {maptree}

Environmental Variables for Oregon, USA

Description

Distributions of 10 environmental variables for 389 grid cells in Oregon, USA.

Usage

data (oregon.env.vars)

Format

A data frame with 389 rows and 10 columns.

Details

Row names are hexagon identifiers from White et al. (1992). Variables (columns) are

bird.spp	number of native breeding bird species
x	x coordinate of center of grid cell
y	y coordinate of center of grid cell
jan.temp	mean minimum January temperature (C)
jul.temp	mean maximum July temperature (C)
rng.temp	mean difference between July and January temperatures (C)
ann.ppt	mean annual precipitation (mm)
min.elev	minimum elevation (m)
rng.elev	range of elevation (m)
max.slope	maximum slope (percent)

Source

Denis White

References

White, D., Preston, E.M., Freemark, K.E., Kiester, A.R. (1999) A hierarchical framework for conserving biodiversity, Landscape ecological analysis: issues and applications, Klopatek, J.M., Gardner, R.H., editors, Springer-Verlag, pp. 127-153.

White, D., Kimerling, A.J., Overton, W.S. (1992) Cartographic and geometric components of a global sampling design for environmental monitoring, Cartography and Geographic Information Systems, 19(1), 5-22.

See Also

oregon.bird.dist, oregon.grid, oregon.border