[Talk-GB] Streams

[SK53]

Last time I looked at OS OpenRivers it only included a relatively small
subset of all watercourses, there may be much more in OS Map Local. At the
time I did a basic comparison of accuracy of OSM ways and like Andy noted a
few streams which turned to rivers & then back again. On a general basis
most things is OS Open Rivers were already in OSM and within 5-10 m of the
OS data.

For basic importing of individual ways, Potlatch3 provides a simple
mechanism where you can read in a shape file & then transfer individual
items from the shape file layer into the editing layer. Of course for OSGB
data all the caveats apply to ensuring the right projection transform is
used (recommend QGIS with the nt15 transform installed). JOSM allows
similar approaches, and would also allow a current geometry to be replaced
by a more detailed one from OSGB data. I also think iD has a custom map
data layer which accepts geojson & kml. You also need to check to what
extent the data is generalised: the equivalent road dataset OS Open Roads
is just a bit too generalised to not require some adjustments once pulled
into OSM.

Jerry

On Tue, 19 Jan 2021 at 21:42, Andy Mabbett <andy at pigsonthewing.org.uk>
wrote:

> On Tue, 19 Jan 2021 at 19:02, Mark Goodge <mark at good-stuff.co.uk> wrote:
>
> > This is something which ought to be amenable to importing data from OS
> > OpenRivers.
>
> That would be wonderful; but is beyond my skill-set.
>
> --
> Andy Mabbett
> @pigsonthewing
> http://pigsonthewing.org.uk
>
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