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Salt-Pan Mapping in San Francisco Bay
旧金山湾盐田测绘仪典
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In California’s South Bay, Ohlone descendants and salt harvesters map crystallization patterns across tidal flats each autumn equinox.在加州南湾，奥隆尼后裔与盐工每年秋分时节共同测绘潮滩上的结晶图案。
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They walk barefoot along levee paths, pressing palm prints into damp salt crusts to mark seasonal shifts.他们赤脚沿堤岸小径行走，将手掌印按在湿润的盐壳上，标记季节更替。
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Maps are drawn not on paper but etched into reclaimed redwood planks using iron-rich bay water as ink.地图不绘于纸上，而是用富含铁质的海湾水作墨，在回收的红木板上刻出。
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Each grid square corresponds to a specific tidal height, linked to stories about sea otters and migrating shorebirds.每个方格对应特定潮位，并关联着关于海獭与迁徙滨鸟的故事。
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Harvesters avoid stepping on ‘white squares’—areas where salt crystals form perfect hexagons—as these are reserved for ceremonial use.盐工避开‘白色方格’——盐晶形成完美六边形的区域，这些区域专供仪式使用。
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Children learn mapping by arranging colored salt samples in concentric circles around elder storytellers.孩子们围坐在长者 storyteller 周围，用彩色盐样摆出同心圆来学习制图。
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No GPS devices are used; instead, participants align their maps with Pleiades’ rising position over Mount Diablo.不使用GPS设备；参与者以昴星团升至迪亚布罗山上方的位置为基准校准地图。
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Finished maps hang in community centers for six months, then dissolve in rainwater collected from rooftop gutters.完成的地图悬挂在社区中心六个月，随后用屋顶檐槽收集的雨水自然溶解。
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Visitors may trace outlines with fingertips but never erase or redraw any line without group consensus.访客可用指尖描摹轮廓，但未经集体共识，不得擦除或重画任何线条。
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The largest map, updated annually since 1982, now covers seventeen acres and shifts subtly with every earthquake tremor.自1982年起每年更新的最大地图，如今覆盖十七英亩，每次地震都会发生细微位移。