On Mon, 23 Aug 2010, john whelan wrote:
The CANVEC tiles contain the full street name. Ottawa has a number of
streets that were imported from Geobase that did not include a street
name, contained abbreviation or only part of the name.
This maybe because of the way the import was done but the CANVEC data
seemed cleaner in this regard.
The Ontario road network imported into OSM came from version 5 of the
GeoBase release (that was the newest version of the time). v5 of the
Ontario geobase road network had no road names in Ontario. When I did the
import I took the road names from the StatsCan data and matched them to the
Geobase road geometries.
The Canvec files Daniel is now producing I think include data from the v6
Geobase road network. These do include road names (and presumably have
other updates).
Someone could probably write a script to go through the v6 geobase data and
update the matching OSM roads with the more up-to-date names and better
geometries, but I'm leaving that as an exercise to the reader.
Steve
Cheerio John
On 23 August 2010 09:14, Bégin, Daniel <[email protected]> wrote:
Hi Brendan,
"John" described the difference between Canvec and GeoBase pretty well!
Daniel
________________________________
From: [email protected]
[mailto:[email protected]] On Behalf Of JOHN SMART
Sent: 20 août 2010 20:46
To: Brendan Morley; [email protected]
Subject: Re: [Talk-ca] Fwd: GeoBase vs CanVec
G'Day Australian Mapper
Perhaps someone from Natural Resources Canada (the Federal mapping agency)
could give a better answer, but my understanding is:
- CanVec originated from the NTDB (National Topographic Database) which is
essentially the same data as is used for the (sometimes quite out of date)
1:50 000 scale National Topographic Series maps. That is all Federal data.
- GeoBase is an initiative which aims to reduce duplication of work / costs
by having Provinces (equivalent to Aus. states) or other entities supply
"best" data to the Feds.
Thus GeoBase would actually be an example of the left hand working in
partnership with the right hand.
I believe CanVec is being updated with any better sources as they become
available, e.g. National Roads Network (NRN) gets migrated into new editions
of CanVec.
I believe there are many data themes that are in CanVec which are not in
GeoBase, and presumably never will be in GeoBase unless the initiative is
extended to include agreements for those themes.
If I have misunderstood anything I'd be delighted to be corrected.
Now, what is "CommonMap"? I had never heard of that until now. A quick web
search gets me here:
http://commonmap.info/w/index.php/Main_Page
It looks to me like it is a very similar concept to OSM, apart from
licensing perhaps. So it makes me wonder if we have a "left hand - right
hand" situation there?
John
________________________________
From: Brendan Morley <[email protected]>
To: [email protected]
Sent: Fri, August 20, 2010 9:11:10 PM
Subject: Re: [Talk-ca] Fwd: GeoBase vs CanVec
Also, I assume if I were to import GeoBase data into CommonMap, I should
follow closely the rules implemented in
http://svn.openstreetmap.org/applications/utils/import/geobase2osm/geobase2osm.py
?
Brendan
On 21/08/2010 9:52 AM, Brendan Morley wrote:
Hello Canadian mappers,
Sam Vekemans suggested I ask the following here:
What is the relationship between CanVec data and GeoBase data?
To this layperson they seem to be two initiatives hosted by the same
government that seem to have similar objectives. Almost like the left hand
not talking to the right hand.
Can anyone explain briefly the differences? For example, it seems to me
that GeoBase is "closer" to the data authors, and CanVec feeds from that,
and CanVec concentrates on having complete coverage at particular scales
(like 1:50k).
Am I on the right track?
Is there a government document that goes into detail?
My interest is to pick out the best bits to seed CommonMap with. I'm
looking for accuracy and timeliness.
Brendan
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