edgeroi {dissever}

Subset of the 1-km resolution soil carbon map and selected subset of environmental covariates for the Edgeroi District, NSW

Description

Subset of the Australian 1-km resolution soil carbon map, along woth selected environmental covariates, for a small area of the Edgeroi district in NSW, Australia.

Usage

data(edgeroi)

Format

The edgeroi dataset is a list with two elements:

carbon

a 7 row, 10 column RasterLayer of soil carbon stocks for a small area in the Edgeroi district NSW, Australia. The grid has a pixel resolution of 1 x 1 km. It contains the predicted soil carbon stock for the 0-30cm depth

predictors

an 87 row, 117 column, 5 layer RasterStack of selected environmental covariates from a small area in the Edgeroi district NSW, Australia. The grids have a pixel resolution of 90m x 90m. It contains the following layers:

Doserate

numeric; gamma radiometric data

Elevation

numeric; topographic variable of bare earth ground elevation. Derived from digital elevation model

Panchromat

numeric; panchromatic band of the Landsat 7 satelite

Slope

numeric; Slope gradient of the land surface. Derived from digital elevation model

TWI

numeric; topographic wetness index. Secondary derivative of the digital elevation model

Details

The Edgeroi District, NSW is an intensive cropping area upon the fertile alluvial Namoi River plain. The District has been the subject of many soil invetigations, namely McGarry et al. (1989) whom describe an extensive soil data set collected from the area. More recently, digital soil mapping studies of the area have been conducted, for example, Malone et al. (2009). The 1km mapping of soil carbon stock was performed using digital soil mapping methods McBratney et al. (2003) using the soil data from McGarry et al. (1989) and available environmental covariates.

Note

The raw spatial data that contributed to the creation of edgeGrids were sourced from publically accessable repositories hosted by various Australian Government and international agencies including CSIRO (for the DEM), Geosciences Australia (for the radiometric data) and NASA (for the Landsat 7 ETM+ data). The projection for the RasterStack is WGS 84 Zone 55.

References

• McGarry, D., Ward, W.T., McBratney, A.B. (1989) Soil Studies in the Lower Namoi Valley: Methods and Data. The Edgeroi Data Set. (2 vols) (CSIRO Division of Soils: Adelaide).

• McBratney, A.B., Mendonca Santos, M.L., Minasny, B. (2003) On Digtial Soil mapping. Geoderma 117: 3-52.

• Malone, B.P., McBratney, A.B., Minasny, B. (2009) Mapping continuous depth functions of soil carbon storage and available water capacity. Geoderma 154, 138-152.

@examples data(edgeroi) summary(edgeroi$carbon) summary(edgeroi$predictors)