[Talk-ca] Proposed features water cover / tidal / intermittent

[Sam Vekemans]

Your right, my mistake.
There is no need to add 'natural=water' to the 'waterway=riverbank' tag.

And that sounds right, the land that is partly covered has and
'surface=undefined', so natural=marsh would not fit, nor
wetland=marsh. (local folks would know)


http://wiki.openstreetmap.org/wiki/Tag:waterway%3Driverbank
"I like to mark riverbanks on its high-water extent, including
sandbanks. Therefore non-permanent islands (sandbanks) are also
included, only permanent islands are marked. "

It seems that is just a matter of opinion (like everything else), .
... since we have the data, and it would help river canoeists to know
where these are. .. i think it should be added. ... (if i was canoeing
down that river (with a remote control - gps guided canoe) .... would
be nice not to get stuck in sand... ... except my eyes shouldn't be on
the device while paddling... but that is not the point :-)  ... a
nicer looking map is..

..... perhaps since we know that it is "undefined" .. why not tag it
as "fixme=surface is undefined" ...?
But i do think that 2 separate proposal pages need to be made  for
'water=intermittent' and 'water=tidal',  & splitting the examples
would help, as we can explain the reasoning for each on 2 pages.

So it becomes 2 sub-values for waterway=riverbank

... thats all i got for now. .. this is a tuff one.. :)

... hopefully someone can help with this/these proposal page(s)


Sam

On 3/23/10, Bégin, Daniel <Daniel.Begin at rncan-nrcan.gc.ca> wrote:
> Hi Sam, and others!
>
> Sam wrote "I worked on a sample here, just outside of Empress, Alberta (in
> Saskatchewan) [...] So i think that waterway=tidal should be used, with
> natural=water".  I'm pretty sure there  is no "tidal" rivers in Saskatchewan
> !-)   The difference between tidal/intermittent is only about water movement
> mechanism.
>
> About the proposition, we are talking about the Canvec feature tags
> conversion, aren't we?
> Actually, intermittent water in the Canvec Product only means that water
> does't cover the area all the time but covers it so often that it changes
> the landscape/vegetation. The area can be covered with grass (your example)
> or mud, sand, peeble, or could even be bare rock!  Converting all of them as
> natural=wetland would be an error. Only local mappers can do further
> tagging.  The water_cover propostion describes it pretty well.
>
> About waterway=riverbank,  I was on the impression it was similar to
> natural=coastline - where there is no need to add natural=water tag - right?
>   If not, I'll made necessary corrections.
>
> Cheers,
>
> Daniel
>
> ________________________________
>
> From: talk-ca-bounces at openstreetmap.org
> [mailto:talk-ca-bounces at openstreetmap.org] On Behalf Of Sam Vekemans
> Sent: 22 mars 2010 23:42
> To: Talk-CA OpenStreetMap; Daniel Begin; Tag discussion, strategy and
> related tools
> Subject: [Talk-ca] Proposed features water cover / tidal / intermittent
>
>
> Hi all,
> Im looking at the canvec feature of this (along with the others related)
>
> 147011* 	Way <http://wiki.openstreetmap.org/wiki/Elements#Way>  	Single line
> watercourse 	None, non isolated, intermittent 	waterway=stream;
> water=intermittent; name=*; fixme=Feature type 	
> and
>
> 148007* 	Area
> <http://wiki.openstreetmap.org/wiki/Elements#Area_.28closed_way_.29>
> 	Waterbody 	Watercourse, isolated, intermittent 	waterway=riverbank;
> water=intermittent, name=* 	
>
> the proposal page is here
> http://wiki.openstreetmap.org/wiki/Proposed_features/Water_cover
> and the canvec feature page is here
> http://wiki.openstreetmap.org/wiki/CanVec:_Hydrography_%28HD%29
> ...
>
> I worked on a sample here, just outside of Empress, Alberta (in
> Saskatchewan) I just guessed on the landuse=meadow; natural=grass (someone
> local can fix it) .. with photos.
> But for the riverbank etc.
> http://www.openstreetmap.org/?minlon=-109.9555934&minlat=50.9222072&maxlon=-109.9224953&maxlat=50.9461371&box=yes
>
> natural=water  (is standard to vaguely describe some type of water)
> unfortunately we dont use natural=water;water=lake, but we DO use
> natural=wetland ( with wetland=marsh for non-flowing water)
> but water=river isn't used.   nor is natural=river used.   yet
> waterway=stream is used.
> So i think that waterway=tidal should be used, with natural=water.
>
>
> So for the main river parts (the main waterflow area), i propose
> natural=water; waterway=riverbank; name=*; source=*; attribution=* (if
> needed)
>
> then for the river banks (the sides where after a rainfall it's not
> distinguishable, but in a drout it's a sand area & if left longer plan-life
> would grow.   So the water level is 'intermittent'.  Hence the original
> value of  water=intermittent,   so i propose
> natural=wetland; name*; source=*; attribution=*(if needed)
>
> As tagging it was "natural=wetland" where the polygon is directly inside the
> "waterway=riverbank" ... makes this wetland flooded.  So i think it makes
> sence.
>
> http://www.openstreetmap.org/browse/way/53097360
>
> Thanks,
> Sam
>
> Twitter: @Acrosscanada
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> Skype: samvekemans
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> @Acrosscanadatrails
>
>
>
>


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