Meuse river data set

Description

This data set gives locations and top soil heavy metal concentrations (ppm), along with a number of soil and landscape variables, collected in a flood plain of the river Meuse, near the village Stein. Heavy metal concentrations are bulk sampled from an area of approximately 15 m x 15 m.

Usage

data(meuse)

Format

This data frame contains the following columns:

x

a numeric vector; x-coordinate (m) in RDM (Dutch topographical map coordinates)

y

a numeric vector; y-coordinate (m) in RDM (Dutch topographical map coordinates)

cadmium

topsoil cadmium concentration, ppm.; note that zero cadmium values in the original data set have been shifted to 0.2 (half the lowest non-zero value)

copper

topsoil copper concentration, ppm.

lead

topsoil lead concentration, ppm.

zinc

topsoil zinc concentration, ppm.

elev

relative elevation

dist

distance to river Meuse; obtained from the nearest cell in meuse.grid, which in turn was derived by a spread (spatial distance) GIS operation, therefore it is accurate up to 20 metres; normalized $[0,1]$

om

organic matter, as percentage

ffreq

flooding frequency class

soil

soil type

lime

lime class

landuse

landuse class

dist.m

distance to river Meuse (metres), as obtained during the field survey

Note

row.names refer to the original sample number

Author(s)

The actual field data were collected by Ruud van Rijn and Mathieu Rikken; compiled for R by Edzer J. Pebesma

References

P.A. Burrough, R.A. McDonnell, 1998. Principles of Geographical Information Systems. Oxford University Press.

http:/www.gstat.org/

Examples

data(meuse)
summary(meuse)