<div>Hi,<br><br>There is a freely available worldwide coastline data set, available from <a href="http://iceds.ge.ucl.ac.uk/viewer/iceds/index.html">http://iceds.ge.ucl.ac.uk/viewer/iceds/index.html</a> .</div>
<div> </div>
<div>The data is free to use for private or commercial uses and includes SRTM, Landsat etc. See my post on the wiki <a href="http://wiki.openstreetmap.org/index.php/Potential_Datasources">http://wiki.openstreetmap.org/index.php/Potential_Datasources
</a> for more detail.</div>
<div> </div>
<div>Nickb<br> </div>
<div><span class="gmail_quote">On 4/27/06, <b class="gmail_sendername">David Groom</b> <<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:reviews@pacific-rim.net" target="_blank"> reviews@pacific-rim.net
</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">I've just converted the coastline data into a gpx file, opened it in JOSM <br>and then in JOSM I downloaded OSM tracks for the Isle of Wight.
<br><br>At present there is not much OSM tracking for the Island, so its a bit<br>difficult to make a conclusion, but my gut feeling is that the<br>orthorectification is slightly adrift, and that the coastline data should be
<br>very slightly north west of where it is. This is based on my comparison of<br>four areas where I am fairly certain I know how the roads I have uploaded to<br>OSM should look in relation to the coastline.<br><br>The actual coastline outline however seems very accurate, its just the
<br>orthorectification vis a vi OSM which seems adrift<br><br>David<br><br><br>----- Original Message -----<br>From: "Richard Fairhurst" <<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:richard@systemeD.net" target="_blank">
richard@systemeD.net</a>><br>To: <<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:talk@openstreetmap.org" target="_blank">talk@openstreetmap.org</a>><br>Sent: Thursday, April 27, 2006 12:27 AM
<br>Subject: [OSM-talk] IoW data<br><br><br>> I've traced a complete coastline for the Isle of Wight, with 1379 points. <br>> It's at <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://wiki.openstreetmap.org/index.php/Isle_of_Wight_Coastline" target="_blank">
http://wiki.openstreetmap.org/index.php/Isle_of_Wight_Coastline</a> .<br>><br>> The outline was traced from an out-of-copyright map, then manually <br>> orthorectified, and finally converted from OSGB to lat/long. It should be
<br>> generally accurate, but there will inevitably be a few places where it<br>> slips a little and may need correcting by real-life, GPS-equipped <br>> surveyors...!<br>><br>> From the IoW project page, I've also linked to an SRTM-derived,
<br>> DEM2TOPO-generated file of 50m contours for the island.<br>><br>> Richard<br>><br>><br>> _______________________________________________ <br>> talk mailing list<br>> <a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:talk@openstreetmap.org" target="_blank">
talk@openstreetmap.org</a><br>> <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk" target="_blank">http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
</a><br>><br>><br><br><br><br><br>_______________________________________________<br>talk mailing list<br><a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:talk@openstreetmap.org" target="_blank">
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</a><br></blockquote></div><br>