This location is intended for use with GRASS/R interface
by Roger Bivand.

(R stats software: http://www.r-project.org)

It is required for the sample data "Maas" contaminated soils dataset
which are included in the package. The examples will only work if R is
started from inside GRASS. The data have been reprojected to UTM zone 32,
using the WGS84 ellipsoid.

Data source:
 gstat package by E.J. Pebesma
 http://www.gstat.org

Data description (subset only):
 Burrough, P. & McDonnell, R. (1998) Principles of geographical information
 systems, New York: Oxford, pp. 309-311).

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This data set contains Maas bank soil pollution data along the Dutch bank of
the river Maas (Meuse) north of Maastricht (they were collected in a flood
plain of the river Maas, not far from where the Maas enters the Netherlands
(Borgharen, Itteren, about 3 to 5 km North of Maastricht). Burrough et al.
1998 use a subset of the same dataset (the area is reduced). This data set
contains the following columns (soil data were collected as bulked samples
within a radius of 5m (Burrough 1998:102, 309)):

East, north (UTM zone 32 coordinates in meters); x, y (local coordinates in
meters); elev (elevation above local reference level in meters); d.river
(distance from main River Maas channel in meters); Cd (Cadmium in ppm); Cu
(Copper in ppm); Pb (Lead in ppm); Zn (Zinc in ppm); LOI (percentage organic
matter loss on ignition); Flfd (flood frequency class, 1: annual, 2: 2-5
years, 3: every 5 years); Soil (3 soil types).
%soil types 1: XX 2: YY, 3: ZZ
% -> get soil types from Burrough 1996

Additionally a raster map "maasbank" is included showing the river bank
area. The raster map "topomap" shows a scanned topographic map in 2.5m
resolution of the study area.

The data have been reprojected for the GRASS/R interface from the Dutch
standard coordinate system to UTM zone 32, using the WGS84 ellipsoid. 
