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PROGRAM:

NAME


r.series.interp - Interpolates raster maps located (temporal or spatial) in between input
raster maps at specific sampling positions.

KEYWORDS


raster, series, interpolation

SYNOPSIS


r.series.interp
r.series.interp --help
r.series.interp [input=name[,name,...]] [datapos=float[,float,...]] [infile=name]
[output=name[,name,...]] [samplingpos=float[,float,...]] [outfile=name]
[method=string] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:
--overwrite
Allow output files to overwrite existing files

--help
Print usage summary

--verbose
Verbose module output

--quiet
Quiet module output

--ui
Force launching GUI dialog

Parameters:
input=name[,name,...]
Name of input raster map(s)

datapos=float[,float,...]
Data point position for each input map

infile=name
Input file with one input raster map name and data point position per line, field
separator between name and sample point is |

output=name[,name,...]
Name for output raster map

samplingpos=float[,float,...]
Sampling point position for each output map

outfile=name
Input file with one output raster map name and sample point position per line, field
separator between name and sample point is |

method=string
Interpolation method, currently only linear interpolation is supported
Options: linear
Default: linear

DESCRIPTION


r.series.interp interpolates new raster maps located temporal or spatial in between
existing raster maps. The interpolation is performed at specific sampling positions. The
sampling position for each output map must be specified, as well as the data position of
the input maps. The following interpolation methods are supported.

· linear: Linear interpolation. At least two input maps and data positions are
required.

EXAMPLES


Interpolate linear three new maps at 3 sampling positions in the interval (0.0;1.0)
First prepare the input maps:
g.region s=0 n=80 w=0 e=120 b=0 t=50 res=10 res3=10 -p3
r.mapcalc expr="prec_1 = 100"
r.mapcalc expr="prec_5 = 500"

Interpolate
r.series.interp --v input=prec_1,prec_5 datapos=0.0,1.0 \
output=prec_2,prec_3,prec_4 samplingpos=0.25,0.5,0.75 \
method=linear

Interpolate using the file option. First prepare the input file:
echo "prec_2|0.25
prec_3|0.5
prec_4|0.75" >> outfile.txt

Interpolate:
r.series.interp --v input=prec_1,prec_5 datapos=0.0,1.0 file=outfile.txt method=linear
The resulting maps will have the values 200, 300 and 400.

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