[NUUG kart] [Imports] kartverket imports to OpenStreetMap

Gnonthgol gnonthgol at gmail.com
Wed Oct 16 23:32:16 CEST 2013

Den 16. okt. 2013 23:05, skreiv Christoph Hormann:
> On Wednesday 16 October 2013, Gnonthgol wrote:
>> The VANNBR tag in the data is not the width in meters, but a code for
>> the width of the river. Code 2 is 1-3m and code 3 is 3-15m wide. I
>> have found this tag to be misleading as it is changed due to
>> aesthetic reasons in the data. (N50 is a vector layer intended for
>> rendering)
> Then it would in my opinion make sense to tag all code 3 as
> waterway=river and code 2 as river or stream depending on manual
> assessment.  No width tag.
Having looked at the data this makes little sense, it is common to have 
a width 3 "river" flow into a width 2 "stream". But the data can be 
quite useful when mapping local areas anyway. It is hard to map a river 
or a stream with only a gps device. This goes in the "vector overlay" 
category instead of import.
> One other thing i saw when looking at the wiki page: There seem to be
> distinct data sets for river and lake polygons and there also seems to
> be a data set for dams.  It would make sense in my opinion to set
> water=reservoir for all lake polygons bordering to a dam and water=lake
> for the rest.  This could be done automatically but of course also by
> hand when merging the data.
Even better, there are different way type for regulated lakes as opposed 
to natural lakes. There is no distinction in the polygons though (SOSI 
have a topolagical data model like TopoJSON or OSM). But this is 
possible to make.

If you want to help us out you should also check out 
https://github.com/Gnonthgol/sosi2osm .


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