## 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.

## SEE ALSO

g.region, r.series, r.series.accumulate

Hints for large raster data processing

## AUTHOR

Sören Gebbert

Last changed: $Date$