It's not just shifting borders. What about changing physical geography? How best to handle changing coastlines over time? I'm thinking of sunken Roman era ports.
http://ac-support.europe.umuc.edu/~jmatthew/naples/pozzport.htm As well as man-made land: http://blog.sfgate.com/ontheblock/2011/02/25/does-your-house-sit-on-landfill/ Also, shifting rivers: http://blogfishx.blogspot.com/2011/05/will-mississippi-river-change-course.html And what about earthquakes? There was 2 to 32 feet of horizontal slip in the 1906 San Francisco earthquake. http://earthquake.usgs.gov/regional/nca/virtualtour/earthquake.php This last one is tricky. -John On 2013-03-04, at 12:07 PM, Rob Warren <[email protected]> wrote: > > I'd like to get it to that point, especially in recording the changes in the > spatial objects over time. > > The other issue is that while a contributor might add the border of the > Kingdom of Prussia and another the border of the Free State of Prussia, the > ways that are common to both objects will eventually need to be merged. This > is going to require some creativity, but it is doable. I also suspect that > eventually we'll have a few different 'application websites' that use the OHM > back-end for storage but render application specific timelines only. > > I'd suggest we start by putting in some data and we'll build the tools as we > go along. > > rhw > > > On 28-Feb-13, at 9:11 PM, [email protected] wrote: > >> Message: 2 >> Date: Thu, 28 Feb 2013 16:52:27 -0600 >> From: Ed Dykhuizen <[email protected]> >> To: Burrito Justice <[email protected]> >> Cc: "[email protected]" <[email protected]>, Joseph >> Pettigrew <[email protected]> >> Subject: Re: [OHM] [Historic] Historic Digest, Vol 7, Issue 9 >> Message-ID: >> <CAHDqN=8gehhzjeazx6-s8rcu00ue0b-wdiqbqdzpnk9myld...@mail.gmail.com> >> Content-Type: text/plain; charset="iso-8859-1" >> >> Hi all, >> >> I don't know if I should be counted towards any quorum of any kind -- I'm >> not a developer, just someone interested in this topic and very happy to >> see it being pursued. Specifically, I had an idea a while ago about >> creating political maps for each year throughout history. So you could look >> at a political map of Europe around 343 BC and then move a dial towards the >> same area around 323 BC and see how the political map changed as Alexander >> the Great went on his conquerin' spree. I'm a big history fan, and more of >> a visual learner, so something like this would really help me solidify a >> lot of world history. >> >> Granted, creating political maps for every year in history is a Herculean >> task. So I was hoping someone could develop an interface that would allow >> non-tech-savvy people like myself to make such changes. You know, something >> where I could go to the map of 343 BC and draw and then manipulate a >> boundary like you do in Photoshop. Maybe I could then put in some >> placemarks for specific events that then link to Wikipedia articles about >> them. Then when I'm done I could hit upload and see the changes on a master >> set of maps that anyone can work on. If it were that easy you could maybe >> get a lot of history buffs to do the work for free, a la Wikipedia. >> Teachers in particular might be interested because the end product could >> really help in teaching history. >> >> I've been reading the emails to try to figure out if something like this is >> in the works, but I admit, there's so much that's over my head that I just >> get lost. Does any of what I'm describing sound like anyone's plans? >> >> Thanks so much for reading this, >> >> Ed Dykhuizen >> >> (And I'm including my friend Joe on this -- hope you don't mind!) > > > _______________________________________________ > Historic mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/historic _______________________________________________ Historic mailing list [email protected] http://lists.openstreetmap.org/listinfo/historic
