Bubbles are wallets. TensorCash wallets use a fresh address for almost every payment, so addresses are grouped into wallets first: addresses whose coins were spent together in one transaction (common-input ownership) are treated as one owner. A bubble's area is its share of the asset's supply at the selected block.
Lines are transfers between two wallets of the map: of the selected asset, and on asset maps also TSC (dashed) and mints from the issuer (long dashes). Wallets connected by lines form a cluster.
Colors — Type (default): exchanges blue, pools & miners orange, issuers green, other named wallets and hubs dark gray, the rest light gray. Cluster: the three largest clusters get a color, smaller ones dark gray. The Hide buttons each cover one type.
Hubs are wallets linked to many others — usually exchanges, pools or services. Their lines are drawn but do not merge clusters unless you enable it in the legend, otherwise one exchange would put all its customers in one cluster.
Intermediaries are wallets outside the top that moved the asset to or from two or more wallets of the map (Bubblemaps calls them magic nodes). They reveal relationships that never show as a direct transfer.
Time travel moves in steps of the snapshot interval; balances and transfers are exact at each step. Ownership uses everything known today.
Data: indexed straight from a TensorCash node (bcore RPC). Indexed supply equals the node's UTXO set and every asset's registry supply. Labels: the explorer's aliases, issuer ICUs and labels.json.