Chinatown filmed at Stone Canyon Reservoir, Los Angeles. Mulwray's body is dragged from this reservoir, which plays a different lake in the story. On screen it's Oak Pass Reservoir.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer. This is an area, not a spot. The coordinate is its middle, so use it to navigate to the place and not to line up a shot.
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