I'm an Old School gamer so number 2 pencil on 1/4 inch grid, 8.5 inches wide and 11 inches long is my favorite medium when making maps. Mapmaking is one of my all time favorite things to do regarding rpg's. I love mapping cities, and dungeons and castles, and even entire worlds. When I get an idea for a great new setting, I start with the places, then I develop the Organizations based on the places, then the key NPC's come about as parts of the organizations.
When I run my game I use a 1 inch grid 22 inches by 25 inches battlemat. I put a sheet of PVC over that to preserve my mat. This allows me to put really cool full color maps and dungeon tiles under the PVC, then mark the plastic to show additional features, spell effects and fallen creatures who become difficult terrain.
To facilitate use of my prepped maps, I draw the encounter areas at 1/4 inch = 5 feet. Then during play that becomes 1 inch = 5 feet. This allows to me scale quite simply to use old school maps (1/4" = 10 feet becomes 1/2 inch = 10 feet). Also I don't create maps that will render larger than my play area. I keep the action on the battlemat. None of my encounter areas will be larger than 22 inches by 25 inches. However, I can fit a lot of encounter into that limited space.
As the Heroes headed west from Greyhawk, they eventually found a traffic jam of several dozen wagons and carts as well as nearly a hundred humanoids all styimied by a bridge that washed out in a recent thunderstorm. Furthermore, they're told by a helpful bard that a band of kobolds are holed up in caves beneath the wreckage of the bridge. As the heroes navigate the muddy bank, they fall under fire of the kobolds. The heroes, however, quickly identify their targets and press the attack, first at range then in melee.
The heroes fight the kobolds, a troll and eventually a band of Hobgoblins representing a local thieves' guild.
These are the map symbols I learned when I was playing D&D out of the original Red Box. These are also the map symbols listed in the most recent Dungeon Master's Guide.
Let me know if you have any questions.
May all your Hits Be Crits!!
