Underfoot
Underfoot
@underfoot.rocks
App for revealing the hydrological and geological world beneath your feet. View geologic maps, track the course of creeks, and more! By @kueda.net
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@openstreetmap.bsky.social waterway data for certain packs (currently just the SF Bay Area). More complete than the NHD for culverted urban creeks (though probably less complete in more data-sparse areas). Here's a trace from Lake Temescal to the Bay in Oakland, CA, which is mostly underground.
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