Hello! Yes I'm going to be moving to fredericton for university in a short time so I thought it would be nice to get building polygons so I can easily add addresses from foot surveys. Is the data that SNB (You and your co-workers) provide available for use with OSM? As in is it possible to trace off the aerial imagery? I've often lamented the fact that the GeoNB viewer has excellent aerial imagery for much of the province while bing imagery is terrible outside major cities. If it is avaliable is it possible to get it as a WMS layer for JOSM? I've looked into the ArcGIS rest APIs but they don't seem very friendly with JOSM.
In reference to the orientation problems, I generally orient according to gps tracks and I also use the road centre lines from the fredericton open data portal to ensure areas are correct. (I know the data hasn't been cleared to use, I simply use it to check the bing imagery) Cheers, ingalls On Mon, Jan 7, 2013 at 3:32 PM, Connors, Bernie (SNB) <bernie.conn...@snb.ca > wrote: > Atmospheric errors are likely to small to be detected by your consumer > grade GPS. Satellite geometry and the number of visible satellites would > have more of an effect and this varies constantly as the satellites transit > across the sky and as you experience varying satellite visibility as you > move past obstructions (buildings, trees, bridges, hills, etc.**** > > ** ** > > Bernie.**** > > --**** > > Bernie Connors, P.Eng**** > > bernie.conn...@unb.ca**** > > New Maryland, NB**** > > ** ** > > *From:* nicholas ingalls [mailto:nicholas.inga...@gmail.com] > *Sent:* Thursday, 2013-01-03 15:24 > *To:* Andrew Buck; talk-ca@openstreetmap.org > > *Subject:* Re: [Talk-ca] Fredericton WMS Offset**** > > ** ** > > Yeah I did a bit more research afterwards to double check, including going > and getting gps more gps traces and the current (Bing) imagery appears to > be dead on. I also checked it with some centre lines from another data > source (Not importing just to check the imagery) and they also verified > that the Bing imagery is correct.**** > > ** ** > > Thanks for the feedback! I hadn't thought about the atmospheric > interference. **** > > ** ** > > Cheers,**** > > ingalls**** > > ** ** > > On Wed, Jan 2, 2013 at 3:59 PM, Andrew Buck <andrew.r.b...@gmail.com> > wrote:**** > > Hi, > > I am not from the area, but I did want to post my 2 cents about this > issue. Your idea of how the offset got started sounds correct. I > would caution you though that GPS traces can be offset, too, due to > atmospheric effects. To really get a good trace with no offset you > need to do a few traces on different days of the same road (or path is > better since it is narrow) and through an area with few buildings > around as these can cause offsets, too. > > Other than those issues, if you trust your traces then I see no reason > not to fix the offset, but as I said make sure your traces are good > first. > > -AndrewBuck**** > > ** ** >
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