The National Soil Inventory (NSI) of England and Wales contains records of the soil at 5671 sites on an orthogonal 5-km grid. The survey was carried out in the 1980s, and both quantitative and qualititative properties were recorded from a bulked sample of the topsoil. The variograms of many variables have a nested structure, and the average correlation ranges are about 20 km and 70 km. Preliminary analyses showed that many of the 31 elements recorded vary on at least two spatial scales. These scales of variation have been separated into a long and a short component by factorial kriging. The large and short range estimates have then been mapped separately.
In addition properties, such as lead, that can be harmful if the concentrations in the soil are too large, have been analysed by disjunctive kriging. The probabilities of certain critical thresholds being exceeded have been determined and mapped.
These and other analyses have resulted in several hundred maps. The maps were done originally in Unimap, but we are now planning to to redo them all in Gsharp ready for the production of a monograph on this work. We shall describe the transfer of these maps to Gsharp and explore the different export facilities for incorporating them into text documents, preferably Word.