convert_qf_modis: Convert bit values from a QFLAG MODIS product

In antoinestevens/MODISExtra: Download and extract MODIS imagery

Description

Convert a Raster* object representing MODIS QFLAG bit values to a Raster* with two categories representing flagged and non-flagged pixels

Usage

convert_qf_modis(r,qf,type,cl = NULL,filename = rasterTmpFile(), ...)

Arguments

r	A Raster-class object
qf	Quality Flag to be extracted. Can be more than one of these: If type = 'MOD13': 'MODLAND_QA','VI_usefulness','aerosol_quantity','adjacent_cloud','atmosphere_brdf','mixed_clouds','land_water_flag','snow','shadow'. If type = 'MOD15':'MODLAND_QC','sensor','dead_detector','cloud','scf_qc'. If type = 'MOD15Extra':'sea', 'snow', 'aerosol', 'cirrus', 'cloud', 'shadow', 'biome'
type	character vector of length 1 giving the MODIS data type. Should be one of these: 'MOD13', 'MOD15', 'MOD15Extra'
cl	cluster object for parallel processing. Default is NULL
filename	Passed to writeRaster.
...	arguments passed to writeRaster.

Value

A RasterBrick-class object with two values (1,0), representing respectively pixels that are flagged by at least one of the give qf, and pixels that are not flagged in any of the given qf

Author(s)

Antoine Stevens

References

https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/mod13a2, https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/mod15a2

See Also

extractBits and interpolate_raster for an example

antoinestevens/MODISExtra documentation built on May 10, 2019, 12:23 p.m.