[HOT] Helping Japan by tracing

Emilie Laffray emilie.laffray at gmail.com
Mon Mar 14 20:50:34 GMT 2011


the coastline in Japan is coming from the Japanese governement and tends to
be pretty good. It is the reason why they are both natural=coastline and
MLIT is one of the Japanese ministries which has tons of open Data. Some of
the data can be pretty old some can be pretty recent. I suspect you can
alter them if you feel that the imagery represents the ground truth, but be
aware that some of those forests are huge.

Emilie Laffray

On 14 March 2011 18:24, Hans van Wijk <hvwijk at planet.nl> wrote:

>  Hello all,
> When I discovered openstreetmap in august 2008, I rapidly joined the
> community. I like helping with improving maps at disaster areas around the
> world. I was able to do that for Haiti a little over a year ago, because not
> much was mapped there yet. I humbly consider myself moderately experienced
> and work with the brilliant JOSM package.
> I'm terrible at using mailing lists though, am more of a forum guy, but
> here I am anyway:
> What I did so far in the Sendai area of Japan was not more then mostly
> tracing a couple of riverbanks with the small patch of bing high res imagery
> there (*http://www.openstreetmap.org/user/Hans%20van%20Wijk/edits*<http://www.openstreetmap.org/user/Hans%20van%20Wijk/edits>),
> but like to do more. I noticed lots of objects from 'MLIT, Japan'.
> Unfortunately they look like being more or less obsoleted by the far better
> bing imagery. The question is: May I alter them and even delete them if
> necessary? I'm having a hard time deciding that for myself. A good example
> is the natural=wood patches on Shichigahama. *http://osm.org/go/7TQ3Q03h*<http://osm.org/go/7TQ3Q03h>
> --
> The coastline is a mix between natural=coastline and
> boundary=administrative. Ideally they should be separate, or not? I like to
> also adjust the coastline, but then I also move the boundary, which is
> unwanted I assume, right?
> Also, I need some reassuring: am I doing some good here?
> Hoping to here from you!
> Best regards,
> Hans van Wijk
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