FUNCTION make_3dmap, dat,nx,ny PURPOSE: Returns a 3d map using the theta's and phi's of a 3d structure. This routine is primarily used by "PLOT3D_NEW". INPUT: dat: a 3d structure (see "3D_STRUCTURE" for more info). nx: x dimension of output array. ny: y dimension of output array. OUTPUT: A 2 dimensional array of bin values that reflect the mapping. KEYWORDS: HIGHEST: force the highest bin number to prevail for overlapping bins. ASSUMPTIONS: theta +/- dtheta should be in the range: -90 to +90. NOTES: if there are any overlapping bins, then the lowest bin number will win, unless the HIGHEST keyword is set. WRITTEN BY: Davin Larson, 96-2-8 LAST MODIFICATION: @(#)make_3dmap.pro 1.7 99/10/22