To grant full expression to the Grid Keys superimposed upon earth's surface by the geocentric cuboda, it is likened to a kind of prism from which issues a quantized set of terrestrial waveforms.


Arguably, waves represent the most economic and elegant transitions between one level and another. Halfway between level  (0° tangents) wave crests and troughs, in both vertical and horizontal senses, all waves exhibit a point of maximum slope, thus making full waves divisible into 1/4, half, and 3/4 waves.


A wave's maximum slope is keyed to an angle from a set of 7 manifested by the symmetric sloping of cubodal elements from prime perspectives.
For example, from a vertex perspective, triangles slope at 35˚, squares at 45˚, and edges at 30˚.


A cubodal angle-keyed waveform is assigned to a topographic construct type by these criteria: practicality; aesthetics;  distinguishability of grids; harmonious connectivity; and symbolic matching of construct to cubodal feature.


For example, as mundane poles represent identical junctures between cubodal features, they find application as grid junctures, both between and with grids. To bring this concept to earth, a cubodal mundane pole is positioned via primary and secondary rotations such that its "pole" is aligned vertically at a specified location.  So positioned, its (30˚) sloping edge defines the maximum slope of a full wave spun 360° to form a landscaping mound for a solitary tree, light pole, etc.


The other cubodal angles (20,˚ 55˚, 60˚, and 70°) are manifested by elements sloping from edge, square, and triangle perspectives. Angles found in a particular perspective other than the one used are regarded as inherent angles. Angles occurring in 2 perspectives have interesting implications.


With the basics of GDCode's topographic design principles addressed, prime applications are addressed next in Architectural Berms, topic 3 Ground Rules.