How does the overworld map menu work?

[Starlock]

Like the title says, I'm starting to try and make the overworld map for my quest,  but I'm not sure how to properly draw out the map? Does every 320x240 map become a 32x24 square on the overworld map? I just need someone to clearly state what would be the best way to tackle creating the world map. Thanks 

[YoshiMario2000]

When drawing out a map, at least for me, I use a base of 16 by 16, and cut said tiles in half for 8 by 8. This will mach up nicely with the tiles of one's map.
So, a 320 by 240 map will have a base 16 grid of 20 by 15.

[oclero]

I drew ZSDX and XD2 maps pixel by pixel, by hand, because it did not match up exactly if using tiles.