[OSM-talk] New tool: Generate coastlines from Landsat imagery
b.easton at exemail.com.au
Sun Aug 5 03:11:26 BST 2007
Very nice tool, but it is not possible to map coastal lakes connected to the sea on the East coast of a continent.
If you pick a point inside the lake, it goes east, hits the lake edge, traces round, out to the coast, then follows the coast northwards.
If you pick a point in the sea, it heads off accross the pacific trying to find a landfall!
I you just need a couple of extra parameters to
a) Select the inital search to be East or West (or South or North?)
b) Select to trace Clockwise or anti-clockwise once landfall reached.
I learn't Perl yesterday, will try and learn Python this afternoon and send you some mods!
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On 3/08/2007 at 9:11 PM Darryl Shpak wrote:
>I've just checked in Lakewalker, a tool that can be used to
>automatically generate coastline data from NASA's Landsat imagery. I've
>used it to trace a lot of the lakes and islands in my area; an example
>can be seen at
>The resulting data is significantly higher resolution than the PGS
>import, and can be used in areas where there is no PGS data.
>Lakewalker resides in
>svn.openstreetmap.org/applications/utils/import/lakewalker, and requires
>Python and the Python Imaging Library. Minimal documentation is
>available in the README and with the --help option.
>If you have questions or suggestions, feel free to email me directly or
>look for me on #osm.
>- Darryl (DShpak)
>talk mailing list
>talk at openstreetmap.org
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University of Western Sydney
Email: b.easton at uws.edu.au
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