spatialEco (version 1.3-5)

curvature: Surface curvature

Description

Calculates Zevenbergen & Thorne, McNab's or Bolstad's curvature

Usage

curvature(x, type = c("planform", "profile", "total", "mcnab", "bolstad"), ...)

Arguments

x

rasterLayer object

type

Method used c("planform", "profile", "total", "mcnab", "bolstad")

...

Additional arguments passed to writeRaster

Value

raster class object of surface curvature

References

Bolstad, P.V., and T.M. Lillesand (1992). Improved classification of forest vegetation in northern Wisconsin through a rule-based combination of soils, terrain, and Landsat TM data. Forest Science. 38(1):5-20.

Florinsky, I.V. (1998). Accuracy of Local Topographic Variables Derived from Digital Elevation Models. International Journal of Geographical Information Science, 12(1):47-62.

McNab, H.W. (1989). Terrain shape index: quantifying effect of minor landforms on tree height. Forest Science. 35(1):91-104.

McNab, H.W. (1993). A topographic index to quantify the effect of mesoscale landform on site productivity. Canadian Journal of Forest Research. 23:1100-1107.

Zevenbergen, L.W. & C.R. Thorne (1987). Quantitative Analysis of Land Surface Topography. Earth Surface Processes and Landforms, 12:47-56.

See Also

writeRaster For additional ... arguments passed to writeRaster

Examples

# NOT RUN {
  library(raster)
  library(spatialEco)
  data(elev)
  elev <- projectRaster(elev, crs="+proj=robin +datum=WGS84", 
                        res=1000, method='bilinear')
curvature(elev, type="planform")
  mcnab.crv <- curvature(elev, type="mcnab")
      plot(mcnab.crv, main="McNab's curvature") 
# }
# NOT RUN {
    
# }