mndvi: MODIS NDVI data from select National Forest sites

In efetac/PolarMetrics: Functions for analyzing seasonal patterns in environmental variables

Description

A data set of Normalized Difference Vegetation Index values (NDVI) from MODIS for a select number of locations. NDVI was sampled each 8 days (46 per year) for a total of 552 samples spanning years 2000 through 2011. MODIS sensors have a spatial resolution of approximately 250 square meters, thus each column represents a 250 x 250 meter area.

Usage

data("mndvi")

Format

mndvi is a data frame with 552 rows and 5 columns. Each column corresponds to the variables as follows:

date

Time stamp

day

a numeric vector of sequential days since January 1, 2000

chl

a numeric vector of NDVI values for the area surrounding the Coweeta Hydrologic Lab (North Carolina) eddy covariance tower at 83.4252 west longitude and 35.0587 north latitude

fef

a numeric vector of NDVI values for the area surrounding the Fraser Experimental Forest (Colorado) CO2 tower (run by NCAR) at 105.885417 west longitude, 39.905028 north latitude

wc

a numeric vector of NDVI values for the area surrounding the Willow Creek (Wisconsin) eddy covariance tower at 90.0798 west longitude, 45.8060 north latitude

Source

http://dx.doi.org/10.3334/ORNLDAAC/1299

Examples

data(mndvi)
  ## Not run: 
  data(mndvi) # Load data
  head(mndvi) # Inspect first few lines of data
  
## End(Not run)

efetac/PolarMetrics documentation built on Dec. 20, 2020, 10:04 p.m.