No worries, nothing stirred.

Most challenges are not intended to be so narrowly focused. The idea is usually some theme or specific goal in mind, but how a map is designed, sized, etc. is really up to the individual cartographer. Creativity is as important as technical application of your intended style and goal. If the rules are too restrictive there's less room for creativity.

Challenges are generally pretty open. Some maps could be made at much lower resolution, as long as the results meet the requirements and otherwise impresses the members at voting time, you've got a chance to win.

Just because someone's map is huge compared to yours doesn't mean that will work against you. Do your best at your intended map, that's all.

GP