Hi, i've just installed Healpix on IDL, and i'm starting to try all the subroutines. First of all, i learned how to make a dipole map with random numbers (it works!:) ). Now i'd like to plot a map using real data. The .txt file is organized like this: DEC(°) AR(°) DATA(uK) ERROR(uK) (i don't need the ERROR column) First of all, i need a to-do list, to draw a fast block diagram. The Healpix manual is just a list of subroutines, and i don't know wich strategy i should use. Can someone help me? I'm new either in Healpix or IDL. Thanks in advance.