[Talk-us] Questions about bsupnik's NHD OSM files

Ben Supnik bsupnik at xsquawkbox.net
Thu Mar 14 19:46:54 UTC 2013


Hi Paul,

Thanks for the clarification.  And I have to admit...50% of the way 
through the update cycle is now pretty stale. :-) :-)

cheers
ben


On 3/13/13 6:04 PM, Paul Norman wrote:
>> From: Ben Supnik [mailto:bsupnik at xsquawkbox.net]
>> Sent: Wednesday, March 13, 2013 2:52 PM
>> To: Paul Norman
>> Cc: 'Mack Stanley'; OpenStreetMap US Talk
>> Subject: Re: [Talk-us] Questions about bsupnik's NHD OSM files
>>
>> Hi Y'all,
>>
>> I've been out to lunch re: NHD for a while..Paul, a stupid q:
>>
>>> The NHD data model changed shortly after bsupnik wrote his conversions
>>> and some fcodes changed. This makes using his conversions difficult.
>>
>> Does this imply that the actual _raw_ dump I have of the data from NHD
>> is fundamentally obsolete and that anyone working on NHD should be using
>> newer source data?
>
> This is true regardless of the schema changes. NHD has a 3 year planned
> update cycle. Depending on the region, this means that the data may have
> been updated or not, but if you're working country-wide you have to be able
> to process the latest.
>
> The schema changes just an additional reason to not use the old data. NHD
> has a set of files in the older schema on their website but I don't believe
> these are being updated.
>
>
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