There is also an other OSM-tag we should keep in mind.
I mean key "old_name". We already have more than 50.000 of them in the
database[1], but no real documentation for it.
What I really miss in this feature is a solution for multiple old names
and the time span for it. For example we have in Germany a lot of
Streets changed there name in this kind:
Emperor-Wilhelm-Street -> Adolf-Hitler-Street -> Karl-Marx-Street (East
Germany) -> back to Emperor-Wilhelm-Street
(...-1936)->(1936-1945)->(1945-1990)->(1990-...)
For some changes we know exactly when it was but not for all.
Also names of cities changed in europe often over the centuries. We have
tons old historic maps and also the Wikipedia as resources for these
changes.
Without the support for this "multiple"-feature, the key is in my eyes
not so useful. Last month we had a talk about it in the german mailing
list and I argument there that to support this feature is too
complicated for OSM but are a good feature for HistoricOSM. I'm not sure
where's the best border between both databases in the future and how
they are to connect.
As a vision I see a map with a time-slider and all streets change there
names if I move the slider.
Greetings Tim alias Kolossos
[1]http://taginfo.openstreetmap.org/keys/old_name
Am 21.01.2013 04:26, schrieb Robert Warren:
I've been reviewing the OSM tags with an eye to historic mapping, there have
been quite a few tags proposed or used to give an object some temporal aspect:
start_date, civilization and era. Some work is going to be required to get the
renderer to handle these according to some user-tunable button but the basics
are already in the openstreet map.
A suggestion is to take a page from the time ontology and adding the following
tags: before and after. The reason for this is that it would ensure sanity when
adding objects that occupy the same space in different times and would give the
renderer a hint as to what to put on the screen instead of overlapping
everything. It would also allow us to link the building as it was used with its
ruins several hundred years later.
Does anyone have any ideas about how to handle events that involve movement,
such as forest fires or battlefields front lines?
Jeff, when you happy with your server setup, I'd like to install the Sparqlify
LOD bridge to the instance. It's the same software as LinkedGeoData.
best,
rhw
[1] http://wiki.openstreetmap.org/wiki/Key:start_date
[2] http://wiki.openstreetmap.org/wiki/Key:historic:civilization
[3] http://wiki.openstreetmap.org/wiki/Key:historic:era
[2] https://github.com/AKSW/Sparqlify/
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