Spatial scale is a specific application of the term scale for describing or categorizing (e.g. into orders of magnitude) the size of a space (hence spatial), or the extent of it at which a phenomenon or process occurs.
[1][2] For instance, in physics an object or phenomenon can be called microscopic if too small to be visible.
In climatology, a micro-climate is a climate which might occur in a mountain, valley or near a lake shore.
In statistics, a megatrend is a political, social, economical, environmental or technological trend which involves the whole planet or is supposed to last a very large amount of time.
[3] These divisions are somewhat arbitrary; where, on this table, mega- is assigned global scope, it may only apply continentally or even regionally in other contexts.