GIS-driven models of soil properties in the high country of the south island

An extensive New Zealand-wide soil survey with sufficient detail for solving land use and environmen-tal protection problems is not financially feasible. Therefore soil scientists need to develop new ways to extrapolate known information about soil. Integrating a conceptual soil-landscape model with a GIS has the potential to make the process of mapping soil data more efficient. This paper describes two GIS-driven soil models of topsoil carbon content in the high country of the South Island of New Zealand. Both models use topography and other information to produce maps of predictions of carbon content that vary continuously