[Talk-ca] Fwd: GeoBase vs CanVec
JOHN SMART
smartowka at rogers.com
Sat Aug 21 01:46:18 BST 2010
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essentially the same data as is used for the (sometimes quite out of date) 1:50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 <morb.gis at beagle.com.au>
To: talk-ca at openstreetmap.org
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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