[Talk-us] NHD: python or java?

[Dale Puch]

On Fri, Aug 7, 2009 at 12:40 PM, James Umbanhowar<jumbanho at gmail.com> wrote:
> On Friday 07 August 2009 04:20:11 Sam Vekemans wrote:
>> On Fri, Aug 7, 2009 at 1:05 AM, Dale Puch <dale.puch at gmail.com> wrote:
>> > On Fri, Aug 7, 2009 at 1:29 AM, David Carmean<dlc at halibut.com> wrote:
>> > > Which tool is most used, at the moment, for importing NHD data?
>> > > Chris's
>> >
>> > python stuff
>> >
>> > > or Ian's java stuff? :)
>> > >
>> > > For those using Ian's stuff, who's developed the most complete rules
>> >
>> > file?
>> >
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>> >
>> > I got the impression that Chris's python is tailored made for the NHD
>> > where Ian's java is geared towards making generic shape imports a lot
>> > easier for the novice or non programmer.
>>
>> Exactly, the java version, is really best for manual importing of the data,
>> and the python is for when your using bulk_upload.py script.  For when you
>> dont need to mess with what is already existing. ie. in many areas, were
>> there are no rivers / waterbodies to conflict with, a full upload is fine.
>> But for this canvec stuff i'm working with (importing rail-lines,
>> powerlines, sport_park_fields etc, i need to watch for what other have
>> done).  So bulk_uploading the data wont help. (ie. importing rivers in the
>> middle of a city, where other mappers might have done just parts of the
>> river. (perhaps in more detail than the import data available)
>>
>
> I've been using the python scripts and uploading with the balrog scripts
> (http://www.openstreetmap.pl/balrog/bulkupload/) , they seem to work more
> reliably for me.
>
> To avoid collison with others' data, I have noted the presence of previously
> uploaded stream and waterbody data and gone back after import and deleting the
> usually less correct NHD data.  This is actually not that big a deal as other
> users usually focus primarily on major rivers and large bodies of water.
>
>> I recommend maintaining just 1 version of the data for each script, with a
>> comparision chart (like i have with the Google Docs chart), as they both
>> need to have all the same tag-matches, and just keep track of the script
>> version.
>>
>> How are you keeping track of the National Dataset?
>> For Canada, Im thinking at using a GoogleDocs spreadsheet might be easier,
>> since there are so many different tiles (canada is made up of an NTS Grid
>> of only 4,984 unique tiles) where some will be uploaded at different levels
>> of completness... and different levels of data available.  So i have a
>> chart with all the types of data..  then what i can do is give access to it
>> for whoever wants it.
>> http://spreadsheets.google.com/pub?key=tmY7V02fBT8C8vimCf8ioXg&output=html
>>
>
> The completed subbasins are being tracked on the NHD Wiki page
> (http://wiki.openstreetmap.org/wiki/NHD#Completed_Basins).  In the case of
> NHD, I think most (all) are uploading the high resolution data, though these
> seem to not be available for all subbasins.
>
> A spreadsheet might be a better solution...
>
>>
>> Hope that helps,
>> Sam
>>
>> > --
>> > Dale Puch
>> >
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>
> James
>
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>

I had thought someone had posted the files for importing NHD with the
right tags already set, but do not see one for either script.  Would
anyone care to share what they have, or should I start making one up
to put on http://wiki.openstreetmap.org/wiki/National_Hydrography_Dataset

-- 
Dale Puch