[Talk-GB] Incorrect use of OS VectorMap District when mapping?

Kevin Peat kevin at kevinpeat.com
Wed Feb 9 20:27:20 GMT 2011

Hi Jason,

I am the mapper (user:devonshire) who imported the woods in your first
example around Dartmouth but it was last May so not exactly recently. The
woods that are there now are a lot better than the NPE traced ones that we
had before. I took the view at the time that importing the VectorMap data
would be a major improvement.

Since the Bing imagery (old as it is) became available I am not sure why
anyone would bother importing VectorMap woods as it is a lot less hassle to
trace from Bing and just take the names from the OS StreetView. Ultimately I
will probably replace the OS sourced data but it isn't a big priority for me
right now. Feel free if you have nothing better to do.

The VectorMap data for streams is good especially as they are virtually
impossible to survey well on the ground. Filling in the blanks may seem like
a good idea but whether it is a track bridging the stream, the stream is
piped or just disappears for a bit (as often happens in wetland areas) is
hard to know without a survey.


On 9 February 2011 18:42, Jason Cunningham <jamicuosm at googlemail.com> wrote:

> OS VectorMap District is an excellent source of data for features like
> streams and woodland, but these layers of data tend to be a bit of a mess
> and need to be stitched together as part of a method in importing into OSM.
> eg Streams will end when they meet a bridge, then reappear the other side
> of the bridge, so for OSM you need to link all the separate sections of the
> streams into one long stream
> Started to notice that the VectroMap District data in its "raw" state has
> started to appear in the map, from more than one mapper
> http://osm.org/go/erduA_U9K--
> http://osm.org/go/eugeBnUca-
> You can see stream are broken presumably at locations of bridges, and
> woodland has strips missing presumably along paths (and is also made up of
> several sections if you look at it in an editor)
> Doesn't appear to be guidance in the wiki about how to deal with VectorMap
> District. I just want to check I'm right in thinking this is the wrong way
> to go about it? If so I'll try and write up some guidance in the wiki.
> Jason
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