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Hi Pierre,<br>
<br>
The 30 m contour lines from tiles 031h03 and 031h06 (the shapefiles
you gave), potentially connected to Richelieu river, have been
imported, and put together in relation:<br>
<a class="moz-txt-link-freetext" href="http://www.openstreetmap.org/?relation=1602671">http://www.openstreetmap.org/?relation=1602671</a><br>
<br>
Clearly, it is not enough to estimate the flooded zone, for which
some kind of flow analysis would be needed, but maybe it can help in
some areas, as you wrote.<br>
<br>
I used "ogr2ogr -where ELEVATION=30 ..." to extract the 30m contour
line, and ogr2osm.py to convert it to .osm, for Josm.<br>
<br>
Best wishes,<br>
<br>
Jean-Guilhem<br>
<br>
<br>
Le 27/05/2011 06:30, Brent Fraser a écrit :
<blockquote cite="mid:4DDF28CC.7040805@geoanalytic.com" type="cite">
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Pierre,<br>
<br>
I can't comment on if the 30m contour solution is suitable, but if
you want to extract the 30m contours, you could:<br>
<br>
1. Use QGIS to extract 30m contour from *_FO.._1.shp files<br>
- load shapefile, Open Attribute Table, click on elevation
field name to sort table by elevation value.<br>
- select all 30m values, click on Layer -> Save
selection as vector file. Save shapefile <br>
<br>
2. Use converter (one of the ones on <a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://wiki.openstreetmap.org/wiki/Import/Shapefile">http://wiki.openstreetmap.org/wiki/Import/Shapefile</a>)
to create .osm files<br>
(I haven't tried this)<br>
<br>
3. Use Josm to load osm files, tag, and update to OSM<br>
<pre class="moz-signature" cols="72">Best Regards,
Brent Fraser</pre>
<br>
On 5/26/2011 8:46 PM, Pierre Béland wrote:
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<div><font color="#000080" size="2">Many osm volunteers have
worked in the last two days to correct roads, complete
Canvec import and add street names.</font></div>
<div> </div>
<div><font color="#000080" size="2">An other task is to estimate
the flooded zone along the Richelieu River and Missisquoi
Bay in Lake Champlain. </font><font color="#000080"
size="2">One simple approach to determine the flooded
zones would be to use the 30 meter contour line from Canvec
data. This would be good at least for Richelieu River.</font></div>
<div> </div>
<div><font color="#000080">These maps from Natural Resources
Dept of Canada shows the 30 meter contour line. For the
areas I visited last week with volunteers, this line
delimits approximately the flooded zone. </font><font
color="#000080" size="2">On monday 23, water level of
the Richelieu river went up to approximately 30.8 meters in
Saint-Jean-sur-Richelieu.</font></div>
<div> </div>
<div><font color="#000080">Would it be a good solution to
estimate the flooded zone ?</font></div>
<div><font color="#000080">If so, any idea, how we can extract
30 meter contour line from shape files using a tool such as
Quantum GIS and convert to OSM ?</font></div>
<div><font color="#000080"><a moz-do-not-send="true"
href="ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/">ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/</a><a
moz-do-not-send="true" class="file"
href="ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/canvec_031h03_shp.zip">canvec_031h03_shp.zip</a></font></div>
<div><font color="#000080"><a moz-do-not-send="true"
href="ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/">ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/</a><a
moz-do-not-send="true" class="file"
href="ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/canvec_031h03_shp.zip">canvec_031h06_shp.zip</a></font></div>
<div> </div>
<div><font color="#000080">Below is an example of Toporama map
for Saint-Jean-sur-Richelieu, the wms version of Canvec,
where we can see the 30 meter contour line.</font></div>
<div><a moz-do-not-send="true"
href="http://atlas.nrcan.gc.ca/auth/english/maps/topo/map?mapsize=525%20466&mapxy=1700511.0503883713%20-122536.87132125527&scale=20000.000000&feature_na=Saint-Jean-sur-Richelieu&searchstring=saint-jean-sur-richelieu&layers=fapfeature%20nodata_ntdb_50k%20north_arrow%20other_features%20roads%20hydrography%20boundary%20builtup%20vegetation%20populated_places%20railway%20power_network%20manmade_features%20designated_areas%20water_features%20water_saturated_soils%20relief%20contours%20toponymy%20contour&map_layer[northarrow]_class[0]_style[0]=ANGLE%20-19.595747561783185&urlappend=%26unique_key%3D8dd3e319d1e111d892e2080020a0f4c9%26map.layer[textzoom03]%3DFEATURE+POINTS+1699114.16619+-120243.877124+END+TEXT+%22Saint-Jean-sur-Richelieu%22+END%26map.layer[textzoom46]%3DFEATURE+POINTS+1699114.16619+-120243.877124+END+TEXT+%22Saint-Jean-sur-Richelieu%22+END%26map.layer[arrowzoom03]%3DFEATURE+POINTS+1699114.16619+-120243.877124+END+END">http://atlas.nrcan.gc.
ca/auth/english/maps/topo/map?mapsize=525%20466&mapxy=1700511.0503883713%20-122536.87132125527&scale=20000.000000&feature_na=Saint-Jean-sur-Richelieu&searchstring=saint-jean-sur-richelieu&layers=fapfeature%20nodata_ntdb_50k%20north_arrow%20other_features%20roads%20hydrography%20boundary%20builtup%20vegetation%20populated_places%20railway%20power_network%20manmade_features%20designated_areas%20water_features%20water_saturated_soils%20relief%20contours%20toponymy%20contour&map_layer[northarrow]_class[0]_style[0]=ANGLE%20-19.595747561783185&urlappend=%26unique_key%3D8dd3e319d1e111d892e2080020a0f4c9%26map.layer[textzoom03]%3DFEATURE+POINTS+1699114.16619+-120243.877124+END+TEXT+%22Saint-Jean-sur-Richelieu%22+END%26map.layer[textzoom46]%3DFEATURE+POINTS+1699114.16619+-120243.877124+END+TEXT+%22Saint-Jean-sur-Richelieu%22+END%26map.layer[arrowzoom03]%3DFEATURE+POINTS+1699114.16619+-120243.877124+END+END</a>
</div>
<div> </div>
<div><font color="#000080">regards</font></div>
<div> </div>
<font color="#000080" size="2">
<hr style="width: 100px;" color="#b5c4df" size="1"
align="left"> </font>
<div><font color="#000080" size="2"><em><span>Pierre Béland</span>
</em></font></div>
<div> </div>
<hr color="#b5c4df" size="1">
<div><font size="2"><strong>De ：</strong> Pierre Béland </font></div>
<div><font size="2"><strong>Date/heure ：</strong> 2011-05-24
18:59:16 </font></div>
<div><font size="2"><strong>A ：</strong> HOT Openstreetmap </font></div>
<div><font size="2"><strong>Cc ：</strong> talk-ca </font></div>
<div><font size="2"><strong>Sujet ：</strong> [HOT] Flooding in
Richelieu River, Quebec,Canada : Follow-up (Complement of
information) </font></div>
<div> </div>
<div><font size="2">
<div><font color="#000080" size="2">Following are the ways
and relation I have produced to document Richelieu River
flooding. </font></div>
<div> </div>
<div><font color="#000080">Affected zones (These will be
revised when I obtain more detailed information on
streets / areas affected.</font></div>
<div> </div>
<div><font color="#000080" size="2"><a
moz-do-not-send="true"
href="http://www.openstreetmap.org/browse/way/114705927">http://www.openstreetmap.org/browse/way/114705927</a>
</font></div>
<div> </div>
<div><a moz-do-not-send="true"
href="http://www.openstreetmap.org/browse/way/114705926">http://www.openstreetmap.org/browse/way/114705926</a>
</div>
<div> </div>
<div><font color="#c0c0c0" size="2">
<div><font color="#000080" size="2"><a
moz-do-not-send="true"
href="http://www.openstreetmap.org/browse/way/114705928">http://www.openstreetmap.org/browse/way/114705928</a></font></div>
<div> </div>
<div><a moz-do-not-send="true"
href="http://www.openstreetmap.org/browse/way/114706976">http://www.openstreetmap.org/browse/way/114706976</a>
</div>
<div> </div>
<div><font color="#000080">Boundary relation that could
be used to produce Indexed map of streets with tools
such as Mapsomatic</font></div>
<div><a moz-do-not-send="true"
href="http://www.openstreetmap.org/browse/relation/1600039">http://www.openstreetmap.org/browse/relation/1600039</a>
</div>
<div> </div>
<div> </div>
</font></div>
<div><font color="#000080" size="2"><em><span>Pierre Béland</span>
</em></font></div>
<div><font size="2"><font color="#000000" face="Verdana"
size="2"><font color="#c0c0c0" face="Verdana" size="2"><font
color="#000080"><font color="#c0c0c0"><font
color="#000080" face="Verdana" size="2"><em></em></font> </font></font></font></font></font></div>
</font></div>
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<pre class="moz-signature" cols="72">--
pgp 0x5939EAE2
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