Bonjour Martijn AFAIK, here is a summary about how old and accurate is Canvec/GeoBase.
Transport Layers? The roads are updated every 1-2 years for most of the provinces, 5-10 for others. Railways were updated 4-5 years ago over all the Canadian landmass. Other layers Water features are 5-40+ years old depending on the province/territory/latitude; Forest areas are 5-40+ years old depending on the province/territory/latitude [1]. The rest is 25-40+ years old. About the accuracy, the road network is about 10m (90%). The rest is usually better than 30m (90%) but you may find offsets between layers. Daniel [1] About forest areas, the latest GeoBase data results from images classification made about 5 years ago that gave the clumsy result Paul Ramsay recently shown on this list. The latest Canvec OSM tiles (2012?) had a mixture of old map data/new GeoBase data. -----Original Message----- From: Martijn van Exel [mailto:m...@rtijn.org] Sent: Monday, 12 September, 2016 23:06 To: Stewart C. Russell; talk-ca@openstreetmap.org Subject: Re: [Talk-ca] Canvec attributes (roads) On 09/12/2016 06:50 PM, Stewart C. Russell wrote: > On 2016-09-12 04:08 PM, Martijn van Exel wrote: >> Aren't these files grouped by feature type? So if we look at roads we >> wouldn't also necessarily need to look at land use boundaries etc.? > > Canvec - the product supplied by NRCan to the general public - always > was split by feature type. It's the OSM tiles, of structure decided > long ago, that lump everything together. > > It's also available as effectively seamless FGDBs if you want to avoid > the cleanup required after using tiled data. The FGDBs retain the > critically important survey dates and accuracies - so you can easily > see how much data's 40 years old and has ±75 m positional accuracy. > Good to know. Are any of the transport related datasets that old or that inaccurate? I created an initial Canvec road network translation file for ogr2osm, so you can convert the Canvec shapefiles to OSM format easily (if you know how to work ogr2osm - let me know if you need help, but Paul Norman is the expert here!) It is located at https://github.com/mvexel/canvec-ogr2osm-translation/blob/master/canvec2016.py and I hope for many forks and improvements. Right now it does a basic job of translating the road classes to OSM types, and the most obvious attributes to the corresponding OSM tags. Let me know what you all think. Martijn _______________________________________________ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca _______________________________________________ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
