Tidy MODIS 'MOD13' VI products' (e.g. MOD13A1, MOD13A2, ...) raw data exported from
Google Earth Engine.
Tidy contents include:
add exact compositing date, see getRealDate()
.
Init weigths according SummaryQA
, see qc_summary()
.
tidy_MOD13(infile, outfile, wmin = 0.2)
infile | A character csv file path or a data.table |
---|---|
outfile | Output file name. If missing, will not be written to file. |
wmin | Double, minimum weight of bad points, which could be smaller the weight of snow, ice and cloud. |
A tidied data.table, with columns of 'site', 'y', 't', 'w', 'date' and 'SummaryQA'.
site
: site name
y
: real value of EVI, [-1, 1]
date
: image date
t
: exact compositing date constructed from DayOfYear
w
: weights
SummaryQA
: A factor, QA types, one of "good", "margin", "snow/ice"
or "cloud".
#> Error in library(phenofit): there is no package called ‘phenofit’#> Warning: data set ‘MOD13A1’ not founddt <- tidy_MOD13(MOD13A1$dt)#> Error in tidy_MOD13(MOD13A1$dt): object 'MOD13A1' not found