#
# prepare the zeng strain map
#
grep -v NaN < ../02_models/zeng/ucerf3_zeng_strain.dat | awk '{print $1,$2,sqrt($5*$5+$6*$6+2*$7*$7)*1.e3 }'  > secinv.gmt
xyz2grd secinv.gmt -Gjunk.grd -I0.1 `grdinfo grad.grd -I0.1/0.1` -r -diNaN
grdsample junk.grd  -nl+t.01 -I.01 `grdinfo grad.grd -I0.1/0.1` -r -Gmask.grd
surface secinv.gmt -I.01 `grdinfo grad.grd -I0.1/0.1` -T.5 -Ll0. -r -Gsurf.grd -V
grdmath surf.grd mask.grd OR = secinv.grd
grdsample secinv.grd `grdinfo grad.grd -I0.1/0.1` -I0.00833333/0.00833333 -r -Gzeng_strain.grd
#
#  clean up
#
rm secinv.gmt secinv.grd  surf.grd mask.grd junk.grd