[Talk-ca] Geogratis vs. GeoBase
Brent Fraser
bfraser at geoanalytic.com
Tue Dec 9 15:56:10 GMT 2008
Sam Vekemans wrote:
> Well then if thats the case, then i think that we need to fix up the
> wiki page to reflect that. .. and state that GeoBase is 'Natural
> Resources Canada' which IS the GeoGratis website portal showing the
> other sites. ... (Gosh this government is confusing ;) .. aargh! ...
>
Then I won't mention the CTIS site (http://www.cits.rncan.gc.ca/)! (and no, there's no free data there (well almost none), only information)
Here's my [limited] understanding:
GeoGratis - "data storage" web site for Federal NRCan Earth Sciences Sector free data distribution.
CTIS - The Federal agency responsible for topographic mapping (part of Earth Sciences Sector).
GeoBase - "data storage" web site by Federal/Prov/Terr agencies to distribute free topographic data
For some reason (historical?, organizational?, disk space?) it does not include the Federal NTS map vector data (at Geogratis) , but it does include NTS digital elevation models. Go figure.
> Or perhaps im not getting it. .. Can we explain;
>
> 1 Where exactly the data in the Ibycus topo came from. (if it was a big
> set and split up, or how it was done)
Likely CanVec or it's predecessor, NTDB.
>
> 2 If everything on the Ibycus Topo is now 'old' ... how to we find the
> new stuff??
CanVec
>
> 3. What's this Atlas of Canada
> <http://atlas.nrcan.gc.ca/site/english/maps/topo/map>thing? why cant i
> download anything from that page?
A web mapping site (not a data download site) for viewing CanVec/NTDB. Created before CanVec/NTDB was freed.
Best Regards,
Brent Fraser
GeoAnalytic Inc.
More information about the Talk-ca
mailing list