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There are a few really good 2D (and some 3D) map editors out there, for the beginners I strongly recommend using Tiled, its got lots of very cool features, is simple to use, outputs data in a lot of good useful formats and more important is still being updated regularly 

https://www.mapeditor.org/

Brian,

Cool. This looks like a handy tool.

Have you even worked with Blender to create maps?