% Erase material outside elliptical boundary
border mask 

axes   -2    2   -1    1  hidden
% Contains a 40 by 79 array of field values
file oeif.mat
read    40   79    1
%  Contains coastlines in Aitoff projection
lines coast10 

width 5
interval -1200 1200 200

%  Draw a black contour line at Br=0
outline 0      

palette 2
label Oersted fieled model OEIF2000: Br on core

%  Automatically plot to terminal
show        
plot 



file igrf.mat
read    40   79    1
lines coast10 
label IGRF1990 field model: Br on core
plot 

stop