[Talk-us] NHD conversions to OSM

[Josh Doe]

I've gone ahead and cleaned up the NHD page a bit.

I've also looked at the data, and I must say I'm confused! One river
is represented in the flh file as waterway=stream, in arhi as
waterway=riverbank, in flmd as waterway=stream (but with worse spatial
accuracy than flh), and then in armd as waterway=riverbank! I suppose
one of the waterway=stream's should be changed to waterway=river, and
only one of the waterway=riverbank objects should be used.

Is this really what the NHD data is like? It will take more time than
I thought to properly merge these these 6 or 7 layers.

If I am confused, then please enlighten me. Preferably by putting it
in the wiki :)
http://wiki.openstreetmap.org/wiki/NHD

-Josh

On Thu, Jun 9, 2011 at 2:37 PM, Josh Doe <josh at joshdoe.com> wrote:
> Can we improve the documentation on the NHD wiki page in terms of the
> import process? I've been wanted to add hydrography to my area
> (Virginia, HUC_6 02070) for a while now, but have been trying to
> obtain local datasets that presumably could be of higher quality. That
> doesn't seem to be panning out, so it's back to NHD.
>
> It would be great to mention on the wiki that you're doing this, as
> not everyone is on the mailing list. For that matter, it would be
> great to consolidate all the tips/suggestions on the wiki:
> http://wiki.openstreetmap.org/wiki/NHD
>
> In the test data you provided I saw a number of objects that didn't
> have any tags that weren't in the gnis or nhd namespace (i.e no
> waterway tag). Is there use in importing these features? Is the
> thinking that maybe in the future we can add sensible tags to these?
> IMHO we either leave them out or give them sensible tags, even if this
> import is the only one that uses them.
>
> Thanks for the work, looking forward to getting all the waterways in
> my area added!
>
> -Josh
>
> On Thu, Jun 9, 2011 at 1:27 PM, Ben Supnik <bsupnik at xsquawkbox.net> wrote:
>> Hi Y'all,
>>
>> I apologize for going NORDO for a while there. :-(  I have integrated James'
>> latest NHD conversion rules.
>>
>> Test data:
>>
>> http://dev.x-plane.com/download/01090001.zip
>>
>> The entire process is running now...not sure how long it will take to
>> complete - it looks like it could take up to a week to convert all of HUCs.
>>
>> If anyone has feedback on that converted set of XML files, please let me
>> know, otherwise I'll let it keep running.
>>
>> Based on the threads about broken imports that took place over the last few
>> weeks, it looks like there is still an additional problem: even given
>> pre-converted data, users who want to do a import may get killed when their
>> import fails, leaving a splattering of broken nodes all over the place. :-(
>>
>> cheers
>> ben
>>
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