[Talk-ca] Hydro Network (inland water) question

[john whelan]

If you're Canadian then you are probably aware that the NRCAN Geobase data
is collected from various sources including provincial some are more
accurate than others some data is probably thirty or more years old.
Canada is very large and we have a lot of water.  We don't have the same
number of mappers per square kilometre as say the UK or Germany.

NRCAN used to produce tiles that were easy to import but its been some
years now since they did this.  Also the tiles were quite small compared to
some lakes.  There were some government cut backs I believe didn't help
matters.

Throw in flack from Germany when the imported data in the map was compared
to satellite imagery and you get the state we are in today.  Strangely
enough the change of OSM license also had an impact we lost one or two
mappers over that and it was a distraction at the time.

Anything else, well the Canadian Import team as far as I know does not
exist.  We have individuals who map but no magic team.

Besides bus stops are more fun to map.

Cheerio John

On 27 September 2018 at 13:09, Peter R <peter.roach at citymaps.com> wrote:

> Hi Canada Import Team,
> I'd like to ask a question that I've been curious about for a few years
> now. What happened during the import of inland water data? Throughout
> Canada, I find instances where tiles are missing water data. This results
> in lakes and other water polygons being abruptly cut off. Some examples:
> https://www.openstreetmap.org/#map=9/55.4821/-65.2981 and
> https://www.openstreetmap.org/#map=9/54.8027/-97.5913
>
> I've also found an instance of rogue ocean tiles at zoom 10 and greater if
> you switch the map layer to Transport Map: https://www.
> openstreetmap.org/#map=10/56.3267/-99.3107&layers=T
>
> I see that importing the Geobase National Hydro Network is still in the
> planning phase according to https://wiki.openstreetmap.
> org/wiki/Geobase/NHN_-_OSM_Map_Feature
>
> I'm just curious as to why water data throughout Canada is very hit or
> miss. I guess I've answered my own question with "it's still in progress"
> but I'm curious nonetheless. I did check the message archives going a year
> back and didn't see anything regarding inland water data.
>
> Cheers,
> Peter
>
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