set parametric
set isosamples 36,72
set hidden

#set title "Observed data"
set urange [-pi/2:pi/2]
set vrange [0:2*pi]
set zrange [-1:1]
set ztics nomirror -1.0,0.25,2.0
set view 45,50,,1
splot cos(u)*cos(v),cos(u)*sin(v),sin(u)

#set noparametric
replot "Datapnts.1" using (cos($1*0.01745)*cos($2*0.01745)):(sin($1*0.01745)*cos($2*0.01745)):(sin($2*0.01745))
#replot "Randompnts.1" using (cos($1*0.01745)*cos($2*0.01745)):(sin($1*0.01745)*cos($2*0.01745)):(sin($2*0.01745))