ponslandia is a land registry on robinhood chain. the land is a survey of 64 by 64 plots. every plot is an erc-721 whose record on chain holds its coordinates, its size, its title number, its parents if it was merged or split, and the address of a vault that only that token can control. the site you are reading draws everything from those records. there is no database of plots, there is a contract.
the token trades on pons with a uniswap v4 hook that takes two percent of every swap and routes it as eth into the pot contract. the pot has a settle line. when its balance reaches the line, anyone can call settle. in that one transaction the pot buys the next tokenised real estate stock in the rotation and credits every live plot's vault its share. the share is the plot's weight over the total weight at that block. the pot goes back to zero and the rotation advances by one. hold the token, and every trade by anyone funds the next round.
weight is area times one plus live neighbours over eight. a single plot alone on the map has weight one. the same plot with all eight neighbours live has weight two. a merged two by two plot with eight live neighbours around it has weight eight. buying the plot next to yours raises both weights, which is why the map fills inward instead of at random. the survey page shows every weight live.
each plot's vault is a minimal contract that holds whatever the pot credited to it. the owner of the plot token can withdraw from it. nobody else can, including the protocol. when the plot token changes hands the vault does not move, it just answers to the new owner, so selling the plot sells the book inside it. merging two plots merges their vaults into the new plot's vault. subdividing splits the vault pro rata by area.
plots come into existence when they are claimed from an open tranche. a claim burns the token deposit from the claimant and pays the tranche's current block price in eth into the pot. tranches open from the centre of the map outward. each one runs a descending price auction: the price starts at the tranche's start price and falls by a fixed amount every block until it hits the floor, and it stays at the floor until the tranche is fully claimed.
every plot has a price its owner set, and every plot is always for sale at that price. anyone can pay it and take the plot and its vault in one transaction. the owner pays a charge on the price into the pot every round. the charge is a fixed share of the price, so a high price costs the owner every round and a low price invites a buyer. if the charge is not paid by the due block plus the grace period the plot forfeits, its price resets to the tranche floor, and the next person to pay the floor takes it. this is what keeps every price on the map honest.
an owner can open an offer to sell the next n rounds of their plot's credits for a minimum lump sum. anyone can fund it. the funder becomes the lien holder and receives the plot's credits for the next n settled rounds, after which the lien clears itself. the lien lives on the title, so if the plot is sold before it clears, the new owner inherits it. the title page draws every lien in the plot's history.
two plots owned by the same wallet that share an edge and together form a rectangle can be merged into one plot with the combined survey record, the combined vault, and a new title number that records both parents. any plot larger than one by one can be split into four equal quarters. both operations burn the old tokens and mint the new ones in the same transaction, and the survey drawing updates on the next read.
every address this site reads from is listed below the moment it exists, with a link to the explorer. every number on the site is a contract read or an event log. if a number is blank, the contract behind it is not deployed yet, and the site is telling you that by leaving the space empty rather than filling it with something that is not true.