rsaga.close.gaps.Rd

% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/RSAGA-modules.R
\name{rsaga.close.gaps}
\alias{rsaga.close.gaps}
\alias{rsaga.close.one.cell.gaps}
\title{SAGA Modules Close Gaps and Close One Cell Gaps}
\usage{
rsaga.close.gaps(in.dem, out.dem, threshold = 0.1, ...)

rsaga.close.one.cell.gaps(in.dem, out.dem, ...)
}
\arguments{
\item{in.dem}{input: digital elevation model (DEM) as SAGA grid file (default file extension: \code{.sgrd})}

\item{out.dem}{output: DEM grid file without no-data values (gaps). Existing files will be overwritten!}

\item{threshold}{tension threshold for adjusting the interpolator (default: 0.1)}

\item{...}{optional arguments to be passed to \code{\link[=rsaga.geoprocessor]{rsaga.geoprocessor()}}, including the \code{env} RSAGA geoprocessing environment}
}
\value{
The type of object returned depends on the \code{intern} argument passed to the \code{\link[=rsaga.geoprocessor]{rsaga.geoprocessor()}}. For \code{intern=FALSE} it is a numerical error code (0: success), or otherwise (default) a character vector with the module's console output.
}
\description{
Close (Interpolate) Gaps
}
\details{
\code{rsaga.close.one.cell.gaps} only fill gaps whose neighbor grid cells have non-missing data.

In \code{rsaga.close.gaps}, larger tension thresholds can be used to reduce overshoots and undershoots in the surfaces used to fill (interpolate) the gaps.
}
\note{
This function uses modules 7 (\code{rsaga.close.gaps} and 6 \code{rsaga.close.one.cell.gaps} from the SAGA library \code{grid_tools}.

SAGA GIS 2.0.5+ has a new additional module \verb{Close Gaps with Spline}, which
can be accessed using \code{\link[=rsaga.geoprocessor]{rsaga.geoprocessor()}} (currently no R wrapper
available). See \code{rsaga.get.usage("grid_tools","Close Gaps with Spline")}
or in version 2.1.0+ call \code{rsaga.html.help("grid_tools","Close Gaps with Spline")}.
}
\examples{
\dontrun{
# using SAGA grids:
rsaga.close.gaps("rawdem.sgrd","dem.sgrd")
# using ASCII grids:
rsaga.esri.wrapper(rsaga.close.gaps,in.dem="rawdem",out.dem="dem")
}
}
\seealso{
\code{\link[=rsaga.geoprocessor]{rsaga.geoprocessor()}}, \code{\link[=rsaga.env]{rsaga.env()}}
}
\author{
Alexander Brenning (R interface), Olaf Conrad (SAGA module)
}
\keyword{interface}
\keyword{spatial}