getHdf | R Documentation |
Create or update a local user-defined subset of the global MODIS grid data archive. Based on user-specific parameters the function checks in the local archive for available data and downloads missing data from the online MODIS data pool. When run in a schedule job, the function manage the continuous update of the local MODIS data archive.
## S4 method for signature 'character' getHdf( product, HdfName, begin = NULL, end = NULL, tileH, tileV, extent, collection = NULL, checkIntegrity = TRUE, forceDownload = TRUE, ... ) ## S4 method for signature 'missing' getHdf(HdfName, checkIntegrity = TRUE, ...)
product |
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HdfName |
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begin, end |
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tileH, tileV |
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extent |
See Details in |
collection |
Desired MODIS product collection as |
checkIntegrity |
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forceDownload |
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... |
Further arguments passed to |
An invisible vector of downloaded data and paths.
Matteo Mattiuzzi
MODIS data is currently available from the online data pools at
NASA Land Processes Distributed Active Archive Center (LP DAAC),
Level-1 and Atmosphere Archive & Distribution System (LAADS), and
National Snow & Ice Data Center (NSIDC).
## Not run: # One or more specific file (no regular erpression allowed here) a <- getHdf(HdfName = c("MYD11A1.A2009001.h18v04.006.2015363221538.hdf", "MYD11A1.A2009009.h18v04.006.2015364055036.hdf", "MYD11A1.A2009017.h18v04.006.2015364115403.hdf")) a # Get all MODIS Terra and Aqua M*D11A1 data from the past 30 days # (can be run in a scheduled job for regular archive update) b1 <- getHdf(product = "M.D13A2", begin = Sys.Date() - 30, tileH = 18:19, tileV = 4) b1 # Same tiles with a 'list' extent Austria <- extent(9.2, 17.47, 46.12, 49.3) b2 <- getHdf(product = "MOD13A2", begin = "2020001", end = "2020031", extent = Austria) b2 # Using country boarders from 'mapdata' package c <- getHdf(product = "MOD13A2", begin = "2016180", end = "2016210", extent = "Luxembourg") c # Interactive selection of spatial extent, see getTile() d <- getHdf(product = "MOD13A2", begin = "2016180", end = "2016210") d ## End(Not run)
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