Hooray! Way to inspire the next generation!
Yes, there were some examples in the following thread:
Here are a couple of admittedly trivial examples of former courses that I’ve mapped so far:
- Way: Little Miami River (198841228) | OpenHistoricalMap (follow the link to the chronology relation)
- Way: Guadalupe River (199813878) | OpenHistoricalMap
- Way: North Fork Pacheco Creek (199558479) | OpenHistoricalMap (didn’t “end”, just got inundated by a reservoir)
The time slider doesn’t distinguish features by type. If something lacks a start_date=*
tag, it’s assumed to have been around since the beginning of time. If it lacks an end_date=*
tag, it’s assumed to exist in the present day. Most natural features in the database lack start and end dates, so we assume they’re extant features that have always been around in the current form. There’s certainly room for improvement.
A couple months ago, we added a validator rule to iD to remind mappers to add start dates to artificial features. However, we’ve exempted natural features because their dates are much more difficult to estimate; we didn’t want to shower mappers with these warnings, because they’d probably tune out the ones that matter. If you are able to determine dates on a waterway or other natural feature, please do tag it on the feature.