[Talk-ca] [HOT] Flooding in Richelieu River, Quebec, Canada : Follow-up (Complement of information)

[Brent Fraser]

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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