<br><br><div class="gmail_quote">On Mon, Mar 9, 2009 at 7:54 PM, Russ Nelson <span dir="ltr"><<a href="mailto:russ@cloudmade.com">russ@cloudmade.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">*I* see OSM as an API for all possible geodata: everything that<br></div>
doesn't move, and a few things that do. There are arguably many<br>
things currently in OSM which should not be edited. For example,<br>
political boundaries at every level.</blockquote><div><br>Well... Many of the boundaries could very well do with some editing.<br><br>I have worked with the Norwegian-Russian and Norwegian-Finnish borders. First of all, the CIA data are very inaccurate (150 meters or more in some cases). Then you have borders that are not static (the Norwegian-Russian border follows the actual thalweg in some places, and most international borders are officially surveyed every 25 years or so). Even when you have a surveyed border and access to the official documents there are inaccuracies (Norway-Finland is accurate to a few millimeters, but the conversion to WGS84 for Norway-Russia is maybe as uch as a few meters inaccurate).<br>
<br>And finally you have OSM tagging changing.<br><br>Some objects needs a lot more care when editing than others, but that is not to say that someone with the right knowledge and sources available should be unable to edit them.<br>
<br> - Gustav<br></div></div><br>