Digital Elevation Model

Description

A 30-meter resolution elevation model in SpatialGridDataFrame format that matches the Landsat images nov and july.

Usage

data(dem)

Details

Elevations are in meters.

Source

Digital Elevation Models for the United States are available from the United States Geologic Survey, http://www.usgs.gov

Examples

	data(dem)
	dem.slopeasp <- slopeasp(dem)

	par(mfrow=c(1,3))
	image(dem)
	image(dem.slopeasp$slope)
	image(dem.slopeasp$aspect)

Results