adding some start_dates to US highways, where possible

adding some start dates to western tracks and trunks without start dates so they don't appear in earlier maps

fixing some relation labels without start dates

adding start_date tag for elements without it; natfoot & others

adding start_date=1804-02-29 to remove rails from older depictions; natfoot & others

fixing some relation labels without start dates

tagging for the renderer? [ducks]

squaring off some docks

adding info for 1853 SF - thank you, Bradley!

coastline tuneup - need to come back and fix date tags and sources

adding some buildings to 1851 SF

adding some buildings to 1851 SF

adding some buildings to 1851 SF

adding some buildings to 1851 SF

adding some buildings to 1851 SF

adding some buildings to 1851 SF

editing some SF area relations

editing some SF area relations

editing some SF area relations

reworking some wetland / old shoreline relations