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.TH "GDAL_FILLNODATA" "1" "Apr 22, 2024" "" "GDAL"
.SH NAME
gdal_fillnodata \- Fill raster regions by interpolation from edges.
.SH SYNOPSIS
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.INDENT 3.5
.sp
.nf
.ft C
gdal_fillnodata.py [\-q] [\-md <max_distance>] [\-si <smooth_iterations>]
                [\-o <name>=<value>] [\-b <band>]
                [\-nomask] [\-mask <filename>]
                [\-interp {inv_dist,nearest}]
                [\-of <format>]
                <srcfile> [<dstfile>]
.ft P
.fi
.UNINDENT
.UNINDENT
.SH DESCRIPTION
.sp
\fBgdal_fillnodata.py\fP script fills selection regions (usually
nodata areas) by interpolating from valid pixels around the edges of the area.
.sp
Additional details on the algorithm are available in the
\fI\%GDALFillNodata()\fP docs.
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.TP
.B \-\-help
Show this help message and exit
.UNINDENT
.INDENT 0.0
.TP
.B \-\-help\-general
Gives a brief usage message for the generic GDAL commandline options and exit.
.UNINDENT
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.TP
.B \-q
The script runs in quiet mode. The progress monitor is suppressed and
routine messages are not displayed.
.UNINDENT
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.TP
.B \-md <max_distance>
The maximum distance (in pixels) that the algorithm will search out for
values to interpolate. The default is 100 pixels.
.UNINDENT
.INDENT 0.0
.TP
.B \-si <smooth_iterations>
The number of 3x3 average filter smoothing iterations to run after the
interpolation to dampen artifacts. The default is zero smoothing iterations.
.UNINDENT
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.TP
.B \-o <name>=<value>
Specify a special argument to the algorithm. Currently none are supported.
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.TP
.B \-b <band>
The band to operate on, by default the first band is operated on.
.UNINDENT
.INDENT 0.0
.TP
.B \-mask <filename>
Use the first band of the specified file as a validity mask (zero is
invalid, non\-zero is valid).
.UNINDENT
.INDENT 0.0
.TP
.B \-of <format>
Select the output format. The default is \fI\%GTiff \-\- GeoTIFF File Format\fP\&.
Use the short format name.
.UNINDENT
.INDENT 0.0
.TP
.B \-interp {inv_dist,nearest}
New in version 3.9.

.sp
By default, pixels are interpolated using an inverse distance weighting
(\fBinv_dist\fP). It is also possible to choose a nearest neighbour (\fBnearest\fP)
strategy.
.UNINDENT
.INDENT 0.0
.TP
.B <srcfile>
The source raster file used to identify target pixels.
Only one band is used.
.UNINDENT
.INDENT 0.0
.TP
.B <dstfile>
The new file to create with the interpolated result.
If not provided, the source band is updated in place.
.UNINDENT
.SH AUTHOR
Frank Warmerdam <warmerdam@pobox.com>
.SH COPYRIGHT
1998-2024
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