Pierre,
I can't comment on if the 30m contour solution is suitable, but if you
want to extract the 30m contours, you could:
1. Use QGIS to extract 30m contour from *_FO.._1.shp files
- load shapefile, Open Attribute Table, click on elevation
field name to sort table by elevation value.
- select all 30m values, click on Layer -> Save selection as
vector file. Save shapefile
2. Use converter (one of the ones on
http://wiki.openstreetmap.org/wiki/Import/Shapefile) to create .osm files
(I haven't tried this)
3. Use Josm to load osm files, tag, and update to OSM
Best Regards,
Brent Fraser
On 5/26/2011 8:46 PM, Pierre Béland wrote:
Many osm volunteers have worked in the last two days to correct roads,
complete Canvec import and add street names.
An other task is to estimate the flooded zone along the Richelieu
River and Missisquoi Bay in Lake Champlain. 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.
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. On monday 23, water
level of the Richelieu river went up to approximately 30.8 meters in
Saint-Jean-sur-Richelieu.
Would it be a good solution to estimate the flooded zone ?
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 ?
ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/canvec_031h03_shp.zip
<ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/canvec_031h03_shp.zip>
ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/canvec_031h06_shp.zip
<ftp://ftp2.cits.rncan.gc.ca/pub/canvec/50k_shp/031/h/canvec_031h03_shp.zip>
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.
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>
regards
------------------------------------------------------------------------
/Pierre Béland /
------------------------------------------------------------------------
*De :* Pierre Béland
*Date/heure :* 2011-05-24 18:59:16
*A :* HOT Openstreetmap
*Cc :* talk-ca
*Sujet :* [HOT] Flooding in Richelieu River, Quebec,Canada : Follow-up
(Complement of information)
Following are the ways and relation I have produced to document
Richelieu River flooding.
Affected zones (These will be revised when I obtain more detailed
information on streets / areas affected.
http://www.openstreetmap.org/browse/way/114705927
http://www.openstreetmap.org/browse/way/114705926
http://www.openstreetmap.org/browse/way/114705928
http://www.openstreetmap.org/browse/way/114706976
Boundary relation that could be used to produce Indexed map of streets
with tools such as Mapsomatic
http://www.openstreetmap.org/browse/relation/1600039
/Pierre Béland /
//
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