[Talk-GB] OS VectorMap water feature import

[Richard Fairhurst]

Graham Jones wrote:
> This is one where it is certainly possible to import the data, but to 
> do it manually is going to be a huge amount of effort, and I wonder 
> if it is really worth the effort?

I think it is, yes. If I may be so immodest to repeat myself from the IRC
quotes page on the wiki:

 <ToeBee> RichardF: right but in my mind keeping daily data up to date is
pretty much unreasonable on any kind of scale. At least currently 
 <RichardF> in my mind getting a bunch of amateurs to map the world is
pretty much unreasoHOLY SHIT WHAT IS THIS OPENSTREETMAP THING

The OS VMD water features have excellent geometries but can benefit, like
anything else, from the local knowledge that makes OSM great. Is this river
boatable? canoeable? Where are the rapids? Where are the shallows? What is
this 'pool' informally known as? 

At present only a few rivers are mapped in OSM to full 'riverbank' level;
even Britain's longest river, the Severn, has wide sections where OSM only
has a rough centreline. Clearly a bulk import would be entirely undesirable.
The manual approach could work much better.

The main practical obstacle, as I see it, is that OS in their infinite
wisdom have started supplying the shapefiles in 100km x 100km squares...
which are certainly far too large to wrangle within a browser-based editor
like P2, and I suspect some desktop editors may choke too. If someone were
to create either a download server for smaller tiles (10km x 10km or even
smaller), or a queryable API for the VMD dataset, we could get stuck in.

cheers
Richard



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