I want to look at the official StarCraft I maps to study them. Is there any place online which lets me do so?
Here are the official images from battle.net: http://classic.battle.net/scc/lp/sc.shtml
This includes all maps on the original game disc, and from Brood War. They are sorted by the number of players recommended for the map (click on the links at the top to see the maps).
The answers given only list maps made by Blizzard. For professional maps, you should look here: http://www.teamliquid.net/tlpd/korean/maps/