Thanks, it'll be a couple months before i see the entire archive :-) Every canvec & geobaseNHN item will have the accuracy tag imported, so that it can be used as reference.
BTW, i went for a walk today, and my gps was getting a 4meter accuracy reading. I use a Garmin GPSMap 60Cx, tracked footways & multi-use pathways, & the pedestrian side of a road bridge. Cheers, Sam On 3/17/09, Daniel Begin <[email protected]> wrote: > Hi Sam, > > > > In a previous email I wrote.. > > > > "- All the road network has been acquired using high accuracy GPS (90% > better than 10m)." > > > > It means that if the previous road network was acquired by scanning, the new > one (NRN) was entirely acquired by GPS. The NRN has replaced the previous > one! The old one doesn't exist anymore. > > However, it's still a good practice to upload GPS tracks, and the rest of > the of canvec/geobase is still between 10 and 30 meter accuracy > > > > Cheers > > > > Daniel > > > > _____ > > From: [email protected] > [mailto:[email protected]] On Behalf Of Sam Vekemans > Sent: March 17, 2009 17:43 > To: Talk-CA OpenStreetMap; Michel Gilbert; Steve Singer; Simon Wood > Subject: [Talk-ca] OpenStreetMap Canada & GPS Tracks & Status update > > > > Hi Silo & talk-ca > > > > Yes, GPS Tracks are always helpful, and everyone is encouraged to continue > to post and share their gps tracks for wherever they go. > > GPS Tracks help by: > > * - They re-affirm the physical existence of roads. The Imported data from > GeoBase NRN was acquired some date in the past and aquired from sources > other than GPS, mainly Vector data. So there are chances that roads are no > longer used or perhaps the road type has changed (ie. a public road became a > private road or logging road, and the map hasnt been updated). > > * - They show the existance of trails / hiking /walking / cycling. > > * - they show the existance of possable routes, > > * - they show where foot briges are, and other maap features which might not > be available as part of the CanVec dataset. > > > > > > So basically, we can never have enough GPS Traces :-) > > > > Status Update: > > Currently, most of Northern Alberta's road network has been uploaded from > the GeoBase NRN, (and with road names) So now this whole area needs to be > physically checked and re-tagged where needed to accurately reflect what is > on the ground. > > > > This now leaves room to import all the CanVec data. The most logical > conclusion is to start the import only in Northern Alberta, as we know that > the roads are all good. (So this will wait until canvec2osm script is out > of Beta phase.) > > > > The 1 snag i have is that part of this CanVec data set includes map some > features which are available in the Geobase NHN (National Hydro Network) So > to handle this, i am creating the script geobaseNHN2osm which looks at all > the GeoBase NHN features and attaches the appropriate tags. So in area's > where the feature also exists in CanVec, the duplicate will be omitted in > the least-detailed dataset. For example, CanVec has rivers listed, but the > names are omited. NHN does have the names, so the NHN name tag features > will be made available. > > > > The obvious conclusion is that the geobaseNHN2osm map features data gets > uploaded BEFORE canvec2osm > > > > The other snag is for GeoBaseNRN data, this has be handled by creating a > separate folder which indicates those features which are already eithor in > OSM, or on their way to being imported. This data is available for > temporary viewing reference only, during the waiting time before geobaseNRN > gets imported. This makes viewing the sample area easier. > > > > In the mean time (as i said before, and continue to repeat) your help is > needed by going through the 11 canvec charts and ensuring that the chosen > tags are the best choice to be used for the import script. Please let me > (or note on the talk page, or change the chart yourself) of tags that need > to be changed. > > > > I feel that importing all of the canvec features, as well as using the > geobaseNHN2osm script can be done at the same time. This would reduce the > possability of finding major errors in the tagging technique and (hopefully > reduce) the probability of needing to revert the import process further > along the line. > > > > Cheers, > > Sam > > _______________________________________________ Talk-ca mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-ca
