[OSM-dev] SoC Project: Preprocessor to add altitude information to OSM data

Graham Jones (Physics) grahamjones at physics.org
Thu Apr 9 11:32:23 BST 2009


Andy is right that the key to getting a true representation is not to just
look at the altitude of nodes, but to integrate the SRTM data between the
nodes to give total climb (the high tech version of counting the contour
lines...).

I think that is what Hermann was intending to do wasn't it?

Graham.

>
> 2009/4/9 Andy Allan <gravitystorm at gmail.com>
>
> On Wed, Apr 8, 2009 at 8:24 PM, Hermann Kraus <herm at scribus.info> wrote:
>> > Hello!
>> >
>> > I have applied for SoC to write an preprocessor that adds altitude data
>> to
>> > ways to allow better bicycle routing, etc.
>> > The complete application text is available at [1] for those of you who
>> > don't have access to Google's mentor interface.
>>
>> > I'm also interested in some feedback on this point. What do the people
>> on
>> > this mailinglist think about it?
>>
>> Hi Hermann,
>>
>> Sounds like your project overlaps quite a bit with Sjors from GSoC
>> 2008 - http://wiki.openstreetmap.org/wiki/Route_altitude_profiles_SRTM
>>
>> So you can probably learn a lot from that - especially why looking at
>> nodes or endpoints of ways isn't great - you miss a lot of detail
>> (potentially entire hills!) along the way! I don't think Sjors work
>> ever influenced routing decisions, so there's still work for you to
>> do.
>>
>> I would suggest looking into his work, and looking at yours as an
>> extension of what's gone before.
>>
>> Cheers,
>> Andy
>>
>> > Regards,
>> >
>> > Hermann
>> >
>> >
>> > [1] http://r2d2.stefanm.com/soc2009/application2009_altitude.txt
>> > [2] http://www.uni-r.de/
>> >
>> > _______________________________________________
>> > dev mailing list
>> > dev at openstreetmap.org
>> > http://lists.openstreetmap.org/listinfo/dev
>> >
>>
>
>
>
> --
> Dr. Graham Jones
> Hartlepool, UK
> email: grahamjones139 at gmail.com
>



-- 
Dr. Graham Jones
Hartlepool, UK
email: grahamjones139 at gmail.com
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