meuse {sp}R Documentation

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)

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)

[Package sp version 0.7-12 Index]