[OSM-talk] IoW data

Nick Black nickblack1 at gmail.com
Thu Apr 27 12:19:15 BST 2006


Hi,

There is a freely available worldwide coastline data set, available from
http://iceds.ge.ucl.ac.uk/viewer/iceds/index.html .

The data is free to use for private or commercial uses and includes SRTM,
Landsat etc.  See my post on the wiki
http://wiki.openstreetmap.org/index.php/Potential_Datasources for more
detail.

Nickb

On 4/27/06, David Groom < reviews at pacific-rim.net> wrote:
>
> I've just converted the coastline data into a gpx file, opened it in JOSM
> and then in JOSM I downloaded OSM tracks for the Isle of Wight.
>
> At present there is not much OSM tracking for the Island, so its a bit
> difficult to make a conclusion, but my gut feeling is that the
> orthorectification is slightly adrift, and that the coastline data should
> be
> very slightly north west of where it is.  This is based on my comparison
> of
> four areas where I am fairly certain I know how the roads I have uploaded
> to
> OSM should look in relation to the coastline.
>
> The actual coastline outline however seems very accurate, its just the
> orthorectification vis a vi OSM which seems adrift
>
> David
>
>
> ----- Original Message -----
> From: "Richard Fairhurst" <richard at systemeD.net>
> To: <talk at openstreetmap.org>
> Sent: Thursday, April 27, 2006 12:27 AM
> Subject: [OSM-talk] IoW data
>
>
> > I've traced a complete coastline for the Isle of Wight, with 1379
> points.
> > It's at http://wiki.openstreetmap.org/index.php/Isle_of_Wight_Coastline.
> >
> > The outline was traced from an out-of-copyright map, then manually
> > orthorectified, and finally converted from OSGB to lat/long. It should
> be
> > generally accurate, but there will inevitably be a few places where it
> > slips a little and may need correcting by real-life, GPS-equipped
> > surveyors...!
> >
> > From the IoW project page, I've also linked to an SRTM-derived,
> > DEM2TOPO-generated file of 50m contours for the island.
> >
> > Richard
> >
> >
> > _______________________________________________
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> > talk at openstreetmap.org
> > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
> >
> >
>
>
>
>
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