[Talk-ca] OpenStreetMap Canada & GPS Tracks & Status update

[Sam Vekemans]

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 <jfd553 at hotmail.com> 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: talk-ca-bounces at openstreetmap.org
> [mailto:talk-ca-bounces at openstreetmap.org] 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
>
>