On Mon, Jul 14, 2008 at 6:39 PM, Mark Gray <<a href="mailto:mark-osmus@hspf.com">mark-osmus@hspf.com</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello, I am a new subscriber to this list. I live in the Atlanta, GA<br>
area. I have been adding to OSM a little in my spare time but now it<br>
seems to be getting closer to my work life.<br>
<br>
I have worked a bit on adding OSM as a background layer to our GIS,<br>
but today I found this mailing list with this discussion and now I am<br>
also thinking about going the other way and adding hydrography to OSM.<font color="#888888"><a href="http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-us" target="_blank"></a><br>
</font></blockquote></div><br>Mark,<br><br>First, read up on the rest of the thread you're replying
to:
<a href="http://lists.openstreetmap.org/pipermail/talk-us/2008-May/000150.html">http://lists.openstreetmap.org/pipermail/talk-us/2008-May/000150.html</a><br><br>...
but let me also answer your questions. I'm not using the NHDPlus
dataset, since it is only released at 1:100K resolution. I believe that
the dataset I'm using is closer to the 1:24K resolution. I received the
dataset on 5 DVDs from the GIS expert at the NHD office and imported
it into a PostGIS database some time ago (45GB of data). Now, I'm working on making an
extract -> convert -> tag -> upload system to convert the
PostGIS data to OSM.<br><br>You can see an initial import of a single
watershed using a script that Matt Perry wrote by looking around this
area:
<a href="http://openstreetmap.org/?lat=45.578&lon=-93.333&zoom=11&layers=B00FTF">http://openstreetmap.org/?lat=45.578&lon=-93.333&zoom=11&layers=B00FTF</a><br>
<br>
There are still tons of data missing from that import script though
(the islands in a lake are drawn as multipolygons of the lake), so that
is a roadblock before the upload of data can take place.<br>
<br>
If you have some ideas on conversion to OSM data, please let us know!