In the following example, we draw a map around residue b50. The map will go into an object called map_a:
map_file m10_a.dsn6 map_par 12. 12. 12. 0.18 sky_blue 0.5 0.1 1 map_obj map_a 2.0 map_atom b50 map_draw
Map_cover is useful when making photographs or plots, and you want to get rid of irrelevant density, but it is also useful just to draw the density around an object. In this case you should chose a large radius, so you dont accidentally mask out density that you want to see. In this macro, we define a sphere of atoms, and cover them with a map:
centre_id wait_id object sph sphere 8. end map_cover sph 5. map_obj map_a map_draw