Description Usage Arguments Details Value Author(s) See Also
Extract time series from GIMMS data.
1 2 | ExtractGIMMS(shapefile, shapedir, ndvidirectory, region,
outfile, Ystart, Yend, shapeext = "shp")
|
shapefile |
name of the shape/kml file with multi-points or polygons from where time series are extracted. |
shapedir |
path to the shape/kml file. |
ndvidirectory |
path to the GIMMS ndvi images folder (GeoTIFF files). |
region |
name of the region, same as in the name of the ndvi images. |
outfile |
name of the file where the time series are saved (extension ".txt"). |
Ystart |
starting year of the analysis (in four-digit format). |
Yend |
ending year of the analysis (in four-digit format). |
shapeext |
extension of the shape/kml file : "shp" for a Esri shapefile or "kml" for a kml file from Google earth . |
GIMMS nomenclature (from Global Land Cover Facility) : (type=GIMMS)
[RE][YY][MMM][DDD].[SAT]-VIg.tif
REidentifies the continent (AF for Africa,AZ for Australia and New Zealand, EA for Eurasia, NA for North America and SA for South America and Central America)
YYcorresponging to the year (two last digits)
MMMabbreviation of the month (three letters)
DDDidentifies the composite period, 15a denotes the days 1-15 of the month, and 15b denotes the days from 16 to the end of the month.
SATidentifies the satellite, NOAA-7, 9, 11, 14, 16, or 17 from which the data originated.
Return the time series of the points/polygons in the shapefile over the desired period.
Romain Frelat and Bruno Gerard
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