smooth_mask: Buffer cloud masks
In sen2r: Find, Download and Process Sentinel-2 Data

smooth_mask

R Documentation

Buffer cloud masks

Description

Internal function (used by s2_mask) which smooths and buffers a 0-1 mask image in order to reduce the roughness of the mask obtained from SCL classification (which is done pixel by pixel). See details.

Usage

smooth_mask(
  inmask,
  tmpdir = tempdir(),
  radius = 250,
  buffer = 250,
  namask = NULL,
  bigtiff = FALSE
)

Arguments

`inmask`	The path of the input 0-1 mask (where 0 represents the area to be masked, 1 the clean surface).
`tmpdir`	(optional) Path where intermediate files (VRT) will be created. Default is a temporary directory.
`radius`	(optional) Numerical (positive): the size (in the unit of `inmask`, typically metres) to be used as radius for the smoothing (the higher it is, the more smooth the output mask will result).
`buffer`	(optional) Numerical (positive or negative): the size of the buffer (in the unit of `inmask`, typically metres) to be applied to the masked area after smoothing it (positive to enlarge, negative to reduce).
`namask`	(optional) The path of an input 0-1 mask where 0 represents the area of the original file with NA values (which should not be smoothed / buffered). Default (NULL) means that no NA values are present.
`bigtiff`	(optional) Logical: if TRUE, the creation of a BigTIFF is forced (default is FALSE).

Value

The path of the smoothed mask.

Note

License: GPL 3.0

Author(s)

Luigi Ranghetti, phD (2019)

References

L. Ranghetti, M. Boschetti, F. Nutini, L. Busetto (2020). "sen2r": An R toolbox for automatically downloading and preprocessing Sentinel-2 satellite data. Computers & Geosciences, 139, 104473. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.cageo.2020.104473")}, URL: https://sen2r.ranghetti.info/.

sen2r documentation built on Nov. 10, 2023, 9:08 a.m.