[Talk-us] NHD data import question

[Ian Dees]

On Thu, Apr 28, 2011 at 7:53 AM, Ben Supnik <bsupnik at xsquawkbox.net> wrote:

> Hi Ian,
>
> I should be able to convert the NHD data sometime in the next week or so.
>  Also, if/when you want the original data, let me know.
>
> For the conversion, do we want medium or high resolution?
>

We'll want high resolution.


>
> Re: the import status map, I don't know how to make an actual map from
> them....short of simply providing a KML file and saying "go look on Google
> Earth", what formats are most useful for making an overlay status map?  (I
> could do that conversion and hand it off to someone.)
>

If you want to send me the shapefile I can work on making that map.


>
> cheers
> ben
>
>
> On 4/28/11 8:48 AM, Ian Dees wrote:
>
>> Yep: if you have the ability and time to cut the national dataset into
>> subbasins I'll give you an SFTP to upload them to and I'll start
>> converting them to OSM.
>>
>>  From there we could add links to the pre-converted subbasin OSM bundles
>> to the wiki pages.
>>
>> Bonus points for converting the subbasin boundary files to
>> KML/GeoJSON/GML and overlaying them on a "import status" map that a user
>> could click on to find their subbasin. I'd be happy to host all this.
>>
>> -Ian
>>
>> On Thu, Apr 28, 2011 at 7:37 AM, Ben Supnik <bsupnik at xsquawkbox.net
>> <mailto:bsupnik at xsquawkbox.net>> wrote:
>>
>>    Hi Y'all,
>>
>>    So let me see if I can summarize where we are so far...
>>
>>    - I could cut the NHD data down to sub-basins. It would not be a
>>    perfect cutting (e.g. each sub-basin might need a little bit of data
>>    "hanging off" since the raw data isn't cut on sub-basin boundaries)
>>    but it would be pretty close, and we expect users to manually check
>>    their imports.  I could also potentially convert the shapefiles to
>>    .osm format on a sub-basin basis.
>>
>>    - It would be nice to make it easier for users to find their
>>    sub-basins.  I'm afraid I don't know how to use the mapnik tool
>>    chain to create a slippy map though.  (Left to my own, I would
>>    probably convert the sub-basin boundaries to KML...that makes me a
>>    heretic, right? :-)  We could also just post the boundary shapefile,
>>    but some users may not be comfortable with shapefiles.
>>
>>    - Importing on a sub-basin basis should be possible in JOSM, if not
>>    a bit of a mouthful.  Importing via potlatch2 vector layers should
>>    be possible - others have seen this work although I have not.
>>
>>    cheers
>>    Ben
>>
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