Concept
Śvetadvīpa Symbolic Features
Part of Goloka

The chart adds a mandala-like symbolic structure to : ten tridents in the ten directions, eight treasures, ten directional protectors, and four colours or potencies. These details express order, completeness, and divine protection; they should not be treated as material security arrangements.
Around and within the quadrangular structure
The chart could have left an unmarked square. Adding tridents, treasures, protectors, and colors says the tradition wants this realm read as complete and guarded, not as an empty diagram waiting to be filled in.
Source: Standard Goloka-Chart explanatory tradition · Chart / explanatory traditionA place described this carefully, symbol by symbol, is being taken seriously — not decorated for its own sake.