ASIP (version 0.4.9)

gemi: Global Environmental Monitoring Index

Description

Global Environmental Monitoring Index (GEMI) is a vegetation based index designed to reduce the effects of atmosperic effects.

Usage

gemi(directory = getwd(), crop = "n", ext2crop = "none")

Arguments

ext2crop, crop, directory

Same as mentioned in arvi.

Value

Computed GEMI product

References

Pinty, B. and M. M. Verstraete (1992) GEMI: a non-linear index to monitor global vegetation from satellites, Vegetatio, 101 (1), 15-20.

Examples

# NOT RUN {
library (raster)
library (rgdal)
# Finding the path of the sample satellite image directory.
# User may define paths directly like "/home/ur_folder" or "C:/ur_folder"
path <- system.file ("TM_sample", package = "ASIP")
shapefil <- paste0 (path, "/test.shp")
op <- gemi (directory = path, crop = "y", ext2crop = shapefil)
# }