[Talk-GB] UPRN Locations Map

Lester Caine lester at lsces.uk
Sat Jul 4 17:24:26 UTC 2020

On 04/07/2020 12:54, David Woolley wrote:
>> At the very least data currently live in on a 'current' view should be 
>> automatically filed to an historic layer when it is replaced
> How does this differ from how OSM already works?  You can already create 
> versions of the map at any point in its history, except where data has 
> been redacted for legal reasons.

The current 'OHM' is not a layer that can be easily combined with the 
current 'OSM' layer. Large sections of the current data are simply 
cloned into OHM anyway. Providing an historic layer which only holds the 
data that has changed over time AND using the same tools to expand on 
that historic data as are used to map current data removes another 
hurdle to maintenance. If third party data such as NLPG can be processed 
to provide it's data as another layer which can then be combined in the 
one view then it removes the need to simply import large data sets. One 
simply uses which set of layers you want ...

Of cause the other approach is simply merge all available data ... past, 
present and future ... into the one humungus database and navigate the 
problems of maintaining potentially thousands of data sets in sync with 
the 'master' copy.

Lester Caine - G8HFL
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