[OHM] representing relationships between historic and modern road nets

[Richard Welty]

On 11/11/19 12:15 PM, Richard Welty wrote:
> On 11/10/19 5:28 PM, SK53 wrote:
>> Hi Richard et al.,
>>
>> My working example is
>> here https://www.openhistoricalmap.org/#map=15/52.9478/-1.1943&layers=H.
> 
> this is pretty similar to what i've done to date. my concerns distill
> down to two things, really
> 
> 1) how do we get from this to a complete, "usable", historic map from
> this combination of OHM and OSM? that path is not clear to me.
> 
> 2) how do we recognize change in OSM that may impact what we have mapped
> in OHM?

oh yeah, how do we reflect simple re-designation, e.g. re-routing of
a numbered highway. a representation of the physical roads is in OSM,
but to reflect the older designations either means duplicating the way
and node data, or else just creating relations in OSM with start/end
dates, which will be prone to breakage by mappers who are unaware that
such data is being maintained.

richard
-- 
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