[Talk-ca] More Google Copying
Sam Vekemans
acrosscanadatrails at gmail.com
Fri Feb 26 21:11:29 GMT 2010
I havent yet heard back from the user, maybe someone else wants to
give it a try?
Sam
On 2/26/10, Adam Dunn <dunnadam at gmail.com> wrote:
> Found an instance where OSM spelling doesn't agree with NRN spelling, but
> does with other map vendors, submitted by the above person. In Valemount,
> BC, NRN has a road in triangular shape called Beavan Crescent, while 8th
> Avenue terminates at Ash Street. The above person got the correct triangular
> shape, but misspelled the road as Bevan Crescent. Interestingly, all of
> Google, Bing, Yahoo and Mapquest agree with the user's spelling and conflict
> with NRN spelling, but they all conflict with NRN/user's geometry.
>
> http://www.openstreetmap.org/?lat=52.830154&lon=-119.256376&zoom=18&layers=B000FTF
> (OSM map will be changing soon due to import, so may change by the time you
> see this).
> http://maps.google.com/maps?ll=52.830277,-119.255911&spn=0.002314,0.006968&t=h&z=18&lci=com.panoramio.all
> http://www.bing.com/maps/?v=2&cp=52.830270779110165~-119.25589308142662&lvl=18&sty=r&where1=Valemount%2C%20BC
> http://ca.maps.yahoo.com/#mvt=m&lat=52.830162&lon=-119.256176&zoom=18
> http://www.mapquest.com/mq/8-62utTxKQKPkU
>
> Meanwhile, Whitepages confirms the NRN spelling of the road.
>
> http://www.whitepages.com/search/FindNeighbors?street=830+beavan+crescent&where=Valemount%2C+BC
>
> It's hard to say who's correct in this situation. Would be nice to have more
> mappers on the ground who can go to the road and look at the street sign.
> Perhaps a misspell in the sign led to the mapping companies differing from
> NRN?
>
> Adam
>
> On Mon, Feb 22, 2010 at 7:00 AM, Bégin, Daniel <
> Daniel.Begin at rncan-nrcan.gc.ca> wrote:
>
>> Hi Sam,
>>
>> you wrote "And the other solution is to be copying directly from the NRCan
>> paper map sheets". Well, it is almost true if you are not concerned by the
>> accuracy.
>>
>> But if you are, you must know that between 2003 and 2008, 9121 datasets
>> were modified to fit the GeoBase alignment Layer.
>>
>> http://www.geobase.ca/geobase/en/data/imagery/landsat/description.html
>>
>> It improved the data (Canvec) accuracy to better than 30 meters for 93% of
>> the files - average accuracy of 22 meters. In some area the displacement
>> was up to 1200 meters !
>>
>> Where is the problem? The data is now more accurate but the corresponding
>> paper maps have not been reprinted (.pdf) and are still affected by
>> accuracy
>> problems!
>>
>> BTW, if you are right about the data source you mentionned in "More Google
>> Copying" tread - it could have been from NTDB data origionally - it shows
>> what you will get in pdf's.
>>
>> Daniel
>>
>> ------------------------------
>> *From:* talk-ca-bounces at openstreetmap.org [mailto:
>> talk-ca-bounces at openstreetmap.org] *On Behalf Of *Sam Vekemans
>> *Sent:* 21 février 2010 20:17
>> *To:* Dan Putler
>> *Cc:* Talk-CA OpenStreetMap; Sam Dyck
>>
>> *Subject:* Re: [Talk-ca] More Google Copying
>>
>> Hi,
>> Yup, i just sent off a nice message. Hopefully it will be recieved. I'll
>> let you know if i get a responce back.
>>
>> On Sun, Feb 21, 2010 at 4:42 PM, Dan Putler
>> <dan.putler at sauder.ubc.ca>wrote:
>>
>>> Could the data be from the StatsCan RNF? That would explain the geometry
>>> being off, while having street names on the ways.
>>>
>>> Maybe?
>> Then if that's true... then i think it's fine what the user is doing.
>> Its still improving the map (from a blank map).
>> Once the NRCan data is available, then more work is needed (for everywhere
>> for all the features). But again it's to improve the map. So the fact
>> that the geometry is off. We need to ask, how much off is it?
>> ... if it's within 10meters, then it's still acceptable (as thats the GPS
>> standard, when no other sources are available).
>>
>> Since GeoBase roads just has the basic linework is available. The
>> solution
>> would be to also convert the GeoBaseNRN data for Manitoba, then have the
>> .osm files open in JOSM & adjust the OSM data to fit the GeoBase road
>> network geometry.
>> And the other solution is to be copying directly from the NRCan paper map
>> sheets (available as PDFfiles). they just need to be alligned with some
>> identifing points (the sheets have corner coordinates on it) and matched
>> to
>> JOSM points. (i used Garmin MapSource to make a waypoint at the exact
>> corners of the sheet to get it lined up)
>>
>> A manual process, but if it's done by local people while adding more
>> details, it shouldn't be that hard.
>>
>> Cheers,
>> Sam
>>
>>
>>> On Sun, 2010-02-21 at 16:34 -0800, Adam Dunn wrote:
>>> > The NRN site confirms that names are not available in Manitoba (NRN
>>> > for that province is on version 3) [1]. Sam, maybe you should send a
>>> > nice email explaining that a blank map is better than an illegal one.
>>> > This person has made edits to my hometown that I basically had to
>>> > revert because the geometry was way off. Don't know what his source
>>> > is...
>>> >
>>> > [1] http://www.geobase.ca/geobase/en/data/nrn/status.html
>>> >
>>> > Adam
>>> >
>>> > On Sun, Feb 21, 2010 at 4:03 PM, Sam Dyck <samueldyck at gmail.com>
>>> > wrote:
>>> > About an hour ago he/she was editing in Saskatoon, and has
>>> > done a lot of work in Rural Manitoba to.
>>> >
>>> >
>>> >
>>> > On Sun, Feb 21, 2010 at 5:48 PM, Sam Vekemans
>>> > <acrosscanadatrails at gmail.com> wrote:
>>> > Not sure if this link works
>>> >
>>> http://www.itoworld.com/product/osm/map?area=1372:7&show=users&sort=total-&colour=date:30
>>> > But you can see whats going on in the area..
>>> > (or just log in and zoom to the area to find the
>>> > mappers)
>>> >
>>> >
>>> http://picasaweb.google.ca/lh/photo/Orkp7E40gO0fwyJ8AKlIZQ?feat=directlink
>>> >
>>> > Ya, it seems like alot of work has been done
>>> > reciently.
>>> >
>>> > Cheers,
>>> > Sam
>>> >
>>> >
>>> > Twitter: @Acrosscanada
>>> > Blog: http://Acrosscanadatrails.blogspot.com
>>> > Facebook: http://www.facebook.com/sam.vekemans
>>> > Skype: samvekemans
>>> > OpenStreetMap IRC: http://irc.openstreetmap.org
>>> > @Acrosscanadatrails
>>> >
>>> >
>>> >
>>> >
>>> > On Sun, Feb 21, 2010 at 3:36 PM, Sam Dyck
>>> > <samueldyck at gmail.com> wrote:
>>> > I did, Geobase doesn't even have the street
>>> > and lacks street names in Manitoba. (at least
>>> > this is the case in the viewer. The Geobase
>>> > data in Winnipeg appears to be out of date by
>>> > at least 14 years in some cases.
>>> > But yes, a mapping party would be a good idea,
>>> > any other Winnipegers on this list?
>>> >
>>> >
>>> >
>>> >
>>> > On Sun, Feb 21, 2010 at 5:18 PM, Sam Vekemans
>>> > <acrosscanadatrails at gmail.com> wrote:
>>> > Thanks for sharing.
>>> > The user seems to be doing alot of
>>> > great work.
>>> > Did you cross-check with the GeoBase
>>> > data?
>>> > Im not sure what the spelling of it is
>>> > in there.
>>> >
>>> > If anyone is in Winnipeg, perhaps a
>>> > couch mapping party is needed?
>>> >
>>> > Cheers,
>>> > Sam
>>> >
>>> >
>>> > On Sun, Feb 21, 2010 at 3:05 PM, Sam
>>> > Dyck <samueldyck at gmail.com> wrote:
>>> >
>>> >
>>> > So I just got a job that
>>> > involves entering addresses
>>> > into Google Maps (don't ask),
>>> > one of these streets, Drobot
>>> > Place (all address in
>>> > winnipeg), Google has either
>>> > deliberately or accidentally
>>> > named Drobol Place (here,
>>> > compare Yahoo, Bing, City of
>>> > Winnipeg Assesment, Google
>>> > Street View (Needs Flash)).
>>> > OSM makes the same mistake as
>>> > Google, which leads me to
>>> > beileve that the street and
>>> > others were copied from
>>> > Google. I really hate telling
>>> > people that I caught them
>>> > "cheating." (I'm sure it was
>>> > an honest mistake) Could
>>> > someone please contact the
>>> > editor responsible (you can
>>> > look him/her up, I don't want
>>> > to name names. I would be
>>> > willing to help with any
>>> > followup and cleanup, and you
>>> > can give them my username
>>> > (sammuell) if you wish, I just
>>> > can't bring myself to send a
>>> > message explaining just how I
>>> > caught them.
>>> >
>>> > Thanks
>>> >
>>> > Sam
>>> >
>>> >
>>> >
>>> >
>>> >
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>>> >
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>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
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>>> >
>>> >
>>> > _______________________________________________
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>>> --
>>> Dan Putler
>>> Sauder School of Business
>>> University of British Columbia
>>>
>>>
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>>
>>
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