modis_mask: MODIS mask

In rspatial/luna: Tools for Satellite Remote Sensing (Earth Observation) Data Processing

MODIS mask

Description

Create a "mask" for a MODIS image based your selection of bad quality pixels, using the Quality Assessment (QA) band.

Usage

modis_mask(x, bits, qmat, ...)

Arguments

x	SpatRaster
bits	single integer value: 16 or 32
qmat	three-column matrix of data.frame. The first and second columns are positive integers (or character representation thereof) indicating the start and end bits (starting counting at one, not at zero!). The third column has the patterns to be rejected, stored as comma-separated characters. See example
...	additional arguments, none implemented

Value

SpatRaster

Examples

## Not run: 
f <- "MOD09A1.A2011009.h21v08.006.2015216112834.hdf"
mod <- rast(f)
shortnames <- substr(names(mod), 86, 120)
names(mod) <- shortnames

qc <- mod[[12]]

from <- c(1,3,11,12) #,16)
to   <- c(2,6,11,14) #,17)
reject <- c("10,11", "1100,1101,1110,1111", "1", "000,110,111") # "11")

qmat <- cbind(from, to, reject)

m <- modis_mask(qc, 16, qmat)
plot(m)

## End(Not run)

rspatial/luna documentation built on Dec. 26, 2024, 12:33 a.m.