The fishers’ struggle over Ennore Creek makes cartography an arena in which the authority to describe territory is actively contested. Official plans rendered industrial encroachment administratively intelligible while displacing ecological histories and situated fishing knowledge. The campaign’s counter-maps did more than add missing observations to an otherwise adequate database: they challenged the premises through which wetlands, livelihoods and legitimate evidence had been defined. The methodological operation is therefore an inversion of cartographic authority, combining counter-histories, affective testimony and geographical demonstration. It exposes wilful ignorance as a produced condition of governance, rather than a simple absence of information. Geography, decolonial scholarship, environmental politics and participatory spatial practice meet at the point where a map becomes a claim upon reality. For a comparative urban archive, the decisive lesson is that conflicting spatial descriptions should not automatically be reconciled into a single consensual layer; the conflict may itself be the most important evidence.