4900 The unit of measurement for the edge of the known world. Beyond this point: no further ink authorised. Fog as zoning decision. The ginkgo branch does not know it is the last thing. The powerline does not know it is holding nothing up. The crane arm gestures at a building that has been administratively removed. At 4900 units, visibility is not lost — it is revoked. The city continues. It simply no longer requires documentation. File closed. White space hereafter.