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The world of Rodorsceaft is much more three-dimensional than that of our world, due to the fact that the world is a tree rather than a sphere. The various tiers of the tree provide a third directional frame of reference that must be accounted for in orientation. Likewise, the non-spherical structure renders the use of a coordinate-based mapping system untenable.

Rodorsceaft physics are Spelljammer physics. The plane of gravity is just below the surface of the Terrestria.

The Solarians, while not being inveterate explorers, were the first to formalize and codify the art of cartography, largely by adopting the Gnomish conventions already in use by their Royal Explorers’ Society. Their maps recognized the following three axes:

A. Treeward/Branchward

The primary axis of orientation is Mam Coeden herself. Since the tree is clearly visible from nearly every locale on the planet, it makes sense to use it as a landmark. When one is facing the tree, one is said to be facing “treeward.” When one is facing away from the tree, one is said to be facing “branchward.” “Outward” is an acceptable alternate term used by some cultures.

In Solarian maps, the Treeward/Branchward axis of orientation is projected onto a polar coordinate system; the Treeward/Branchward value is the radial coordinate and represents the number of leagues from the center of the tree (around which the entire planet rotates).

B. Sinstward/Dextward

The secondary axis of orientation requires arbitrary codification. If one is facing treeward, Sinstward is to one’s left and Dextward is to one’s right.

In Solarian maps, the Sinstward/Dextward value is the angular coordinate and ranges from 1 to 360. The zero-axis passes through the city of Lux and increases Dextward.

C. Skyward/Groundward

Less commonly used in Solarian maps is the third axis, that of Skyward/Groundward. Because the direction of gravity is obvious and, for all that there are many “tiers” of civilization they are more a stack of two-dimensional planes rather than a truly three-dimensional system, this axis is defined largely as a formality. “Up” and “down” are also perfectly acceptable substitutes for the respective terms.

In the rare cases where this axis is used in maps, it is a value representing the point’s distance in leagues from the gravity plane.

The Solarian standard also recognized four “quadrants” and three “tiers,” each roughly corresponding to a major branch. Though these major branches each tended to have their own local names (being roughly analogous to continents), for “official” purposes the coordinates stand. The Cit of Light lies on the major branch of the First Quadrant, with the Quadrants proceeding sunward (i.e. sinstward) from there.

As for the tiers, they correspond to the three major levels of branches (not including the Sunlands). The tier nearest the ground is the First Tier; Solaria is on the Second Tier and the Third Tier is the highest.

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Rodorsceaft: Pillar of Heaven TheEndlessBard