[OSM-talk] map tool to visualize river "topology" (Fwd: River system analysis tool for Haiti)
maning sambale
emmanuel.sambale at gmail.com
Tue Oct 26 12:10:05 BST 2010
I found the site below from the osm-hot list:
The map shows river directions and rivers mouths draining to nowhere.
Good tool to Q/A waterway features, hope this is available worldwide.
One useful visualization would probably be,
varying line thickness depending on waterway hierarchy (stream/creeks,
rivers, riverbank, sea) from mountain peak to coast. There are
exceptions of course.
---------- Forwarded message ----------
In Russia we have a tool which helps to correct some types of
topological errors in river systems.
http://dezhin.gis-lab.info/yav/?zoom=8&lat=55.37264&lon=39.44807&layers=BFFFFFTT
(sorry, it's in russian)
red markers - mouths without continuing
magenta markers - nodes of which flow out multiple rivers, but no one
does not fall into
If you want, then I can share the source code and help in setting up this tool.
It uses osm2pgsql, sql, mapserver and openlayers.
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cheers,
maning
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