As I have been researching the idea of a standard for building castles on a micro scale, I have come across a few discussions in various places. Most are a few years old, and I haven’t been able to find anyone that is currently working on a standard. If you know of anyone, please point it out to me in the comments.
What I have taken away from all that I’ve read is that a Carcassone style of tile is probably best, at least for the roads and rivers. I find the idea of a “wall standard,” meaning modularized castle walls, to be somewhat restrictive. A standard would require all castles to be built with the same color and wall design, and I think this will result in less variety and creativity in castle design. So, rather than come up with a wall standard, I am simply going to say that all castles need to be contained on the module. Even if this means building a double module so that there is enough room for the castle.
The size that I have chosen to start out with is 13x13. This allows for a plate six studs wide to be used on either side of a blue tile that represents water. The drawback to this, other than a need for multiple plates, is that the technic piece used to connect the plates has to be at least four studs long. I feel this is a better trade off than having the all water modules terminate with a spot two studs wide.
Another benefit of 13x13 is that an "adapter" can be created that allows a micro castle module to fit the micropolis standard, if the technic bricks are done correctly. Since the micropolis standard is much more widely used, this makes the micro castle modules a little more versatile.
Here are the first three modules that I have photographed. I have another castle on the way, and then I will be working on some forest land.
One thing that becomes readily apparent in these pictures is that a standard color for roads needs to be decided upon.