Run the following commands to plot the input and output of Shift-Data-Plane:
$MET_TUTORIAL_DATA/input/sample_fcst/2005080700/wrfprs_ruc13_12.tm00_G212 \
$MET_TUTORIAL_DATA/output/shift_data_plane/shift_input.ps \
'name="PRES"; level="Z0";'
plot_data_plane \
$MET_TUTORIAL_DATA/output/shift_data_plane/shift_pres.nc \
$MET_TUTORIAL_DATA/output/shift_data_plane/shift_output.ps \
'name="PRES_Z0"; level="(*,*)";'
Display the output images by running the following commands:
gv $MET_TUTORIAL_DATA/output/shift_data_plane/shift_output.ps &
Notice the rigid shift that has been applied. Why would anyone want to shift data in this way? This tool has been applied when doing feature-relative verification. For example when evaluating hurricane forecasts, select the forecast storm track location and the corresponding location of the BEST track. Prior to computing grid-to-grid statistics, first shift the data from the forecast track location to the BEST track location. Then compute statistics near the storm. This is a simple way of removing the effect of track error when evaluating hurricane forecasts.
