spatialEco (version 1.3-7)

hli: Heat Load Index

Description

Calculates the McCune & Keon (2002) Heat Load Index

Usage

hli(x, check = TRUE, force.hemisphere = c("none", "southern", "northern"))

Value

raster class object of McCune & Keon (2002) Heat Load Index

Arguments

x

rasterLayer class object

check

(TRUE/FALSE) check for projection integrity and calculate central latitude for non-geographic projections

force.hemisphere

If country is split at the equator, force southern or northern hemisphere equation c("southern", "northern")

Author

Jeffrey S. Evans <[e-mail]>

References

McCune, B., and D. Keon (2002) Equations for potential annual direct incident radiation and heat load index. Journal of Vegetation Science. 13:603-606.

McCune, B. (2007). Improved estimates of incident radiation and heat load using non-parametric regression against topographic variables. Journal of Vegetation Science 18:751-754.

Examples

  library(raster)
  data(elev)
  heat.load <- hli(elev)
    plot(heat.load, main="Heat Load Index")