<div class="gmail_quote">On Thu, Jun 9, 2011 at 2:43 PM, Josh Doe <span dir="ltr"><<a href="mailto:josh@joshdoe.com">josh@joshdoe.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
I've gone ahead and cleaned up the NHD page a bit.<br>
<br>
I've also looked at the data, and I must say I'm confused! One river<br>
is represented in the flh file as waterway=stream, in arhi as<br>
waterway=riverbank, in flmd as waterway=stream (but with worse spatial<br>
accuracy than flh), and then in armd as waterway=riverbank! I suppose<br>
one of the waterway=stream's should be changed to waterway=river, and<br>
only one of the waterway=riverbank objects should be used.<br>
<br>
Is this really what the NHD data is like? It will take more time than<br>
I thought to properly merge these these 6 or 7 layers.<br>
<br></blockquote><div><br></div><div>Yes. You should only be using "high" resolution. "High" resolution is already a bit too low for OSM and "medium" is even worse. The "area" dataset consists of polygons that represent rivers wider than a certain cut-off width. Below that width they are represented only as flowlines. Above that width they are represented as flowlines of type "artificial" and a polygon in the "area" dataset.</div>
<div><br></div><div>I would suggest reading the NHD data description. It's only a few pages of text if you skip some of the code/type mappings.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
If I am confused, then please enlighten me. Preferably by putting it<br>
<div class="im">in the wiki :)<br>
<a href="http://wiki.openstreetmap.org/wiki/NHD" target="_blank">http://wiki.openstreetmap.org/wiki/NHD</a></div></blockquote></div>