Spatial dimension is the most basic feature of geographical phenomena, which is determined according to the actual distribution characteristics of geographical objects and the needs of map expression.
Including 0-dimension, 1 dimension, 2-dimension, 2-dimension, 5-dimension and 3-dimension.
On the smallest scale, modern scientists have proved that the spatial structure of the universe has both expansion and curl dimensions.
Now people only know the concepts of zero-dimensional point, one-dimensional straight line, two-dimensional plane, three-dimensional space and "four-dimensional space-time" mentioned by Einstein.
In addition, superstring theory predicts that there should be six other unknown spatial dimensions.
Scientists believe that six "hidden" spatial dimensions are curled up at every point in the universe with extremely tiny geometric shapes.