[OSM-dev] dev Digest, Vol 113, Issue 7

[sukhjit sehra]

Hello,

Can you please share the data mining techniques can be employed on OSM data.

regards


On Mon, Aug 18, 2014 at 5:30 PM, <dev-request at openstreetmap.org> wrote:

> Send dev mailing list submissions to
>         dev at openstreetmap.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>         https://lists.openstreetmap.org/listinfo/dev
> or, via email, send a message with subject or body 'help' to
>         dev-request at openstreetmap.org
>
> You can reach the person managing the list at
>         dev-owner at openstreetmap.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of dev digest..."
>
>
> Today's Topics:
>
>    1. How to handle these issues? (Sandor Seres)
>    2. Re: How to handle these issues? (Mateusz Konieczny)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 17 Aug 2014 15:04:19 +0200
> From: "Sandor Seres" <sandors39 at gmail.com>
> To: <dev at openstreetmap.org>
> Subject: [OSM-dev] How to handle these issues?
> Message-ID: <00cd01cfba1b$c3091770$491b4650$@gmail.com>
> Content-Type: text/plain; charset="us-ascii"
>
> I am not quite shore how to handle the following two dilemmas:
>
> 1.If a rendering system renders the planet-sea area objects (instead of
> planet-land area objects), is then Antarctica a hole in the global ocean
> object or the global ocean object simply ends by the upper border-line of
> Antarctica?
>
> 2.There are around 25460 objects in the class defined by the tag
> natural=land in the latest dump. The wiki documentation for the same tag
> says "This tag should not be used". How to interpret this?
>
> Are editors refusing data with this tag? Should we ignore the data with
> this
> tag in the dumps? Looking at different OSM based maps I see that I am not
> the only one confused with the issue. Unfortunately, the class contains
> area
> objects related to all water types/classes so, this is not just
>
> rendering them at certain stage. In vector mapping, as you certainly know,
> it is much more complicated.
>
> Thanks for suggestions/meanings.
>
> Sandor
>
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <
> http://lists.openstreetmap.org/pipermail/dev/attachments/20140817/d385fb56/attachment-0001.html
> >
>
> ------------------------------
>
> Message: 2
> Date: Sun, 17 Aug 2014 18:51:43 +0200
> From: Mateusz Konieczny <matkoniecz at gmail.com>
> Cc: dev at openstreetmap.org
> Subject: Re: [OSM-dev] How to handle these issues?
> Message-ID:
>         <
> CALDvra60Pa6-L8YPaFSXx8B03mrePz905dgtQ+W80_YLgdb1QA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> ad 2)
> - natural=land tag was used
> - multipolygons were used to achieve the same goal
> - multipolygons are better (solution of general problem), so natural=land
> was described as bad idea
> - existing natural=land gets replaced by multipolygons what is ongoing
> process (see
> http://taginfo.openstreetmap.org/tags/natural=land#map for progress - for
> example in central Europe this tag is gone or was never used)
> - JOSM since https://josm.openstreetmap.de/changeset/7391/josm encourages
> users to update tagging (4 days ago)
>
> Tag may be either used to use full available data or be ignored to make
> data processing easier and encourage update of tagging.
>
>
> 2014-08-17 15:04 GMT+02:00 Sandor Seres <sandors39 at gmail.com>:
>
> > I am not quite shore how to handle the following two dilemmas:
> >
> > 1.If a rendering system renders the planet-sea area objects (instead of
> > planet-land area objects), is then Antarctica a hole in the global ocean
> > object or the global ocean object simply ends by the upper border-line of
> > Antarctica?
> >
> > 2.There are around 25460 objects in the class defined by the tag
> > natural=land in the latest dump. The wiki documentation for the same tag
> > says ?This tag should not be used?. How to interpret this?
> >
> > Are editors refusing data with this tag? Should we ignore the data with
> > this tag in the dumps? Looking at different OSM based maps I see that I
> am
> > not the only one confused with the issue. Unfortunately, the class
> contains
> > area objects related to all water types/classes so, this is not just
> >
> > rendering them at certain stage. In vector mapping, as you certainly
> know,
> > it is much more complicated.
> >
> > Thanks for suggestions/meanings.
> >
> > Sandor
> >
> > _______________________________________________
> > dev mailing list
> > dev at openstreetmap.org
> > https://lists.openstreetmap.org/listinfo/dev
> >
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <
> http://lists.openstreetmap.org/pipermail/dev/attachments/20140817/79ea171d/attachment-0001.html
> >
>
> ------------------------------
>
> _______________________________________________
> dev mailing list
> dev at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/dev
>
>
> End of dev Digest, Vol 113, Issue 7
> ***********************************
>



-- 
Er. Sukhjit Singh Sehra
Assistant Professor
Dept of Computer Science Engg.
Guru Nanak Dev Engineering College, Ludhiana, Punjab
Mobile No:- 09855959200
*In your free time kindly visit Sikh-relics.com  -  A Gallery of Blessed
Relics of Sikh Guru Sahib
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/dev/attachments/20140828/62410294/attachment.html>