[Talk-ca] Deleting existing roads...

[Tyler Gunn]

> I tried seeing if I could take two CanVec block and merge them with 
> existing roads.   Well I created a mess and ended up deleting the 
> blocks.   

Yeah, working with the Canvec data in an already populated area of the OSM
map is frustrating to say the least.  I've been working on a tile that
encompasses my neighborhood and ended up just shelving it for now because
there are so many issues merging the two.  In the end I've almost ended up
just using the Canvec data as a guide to re-align the roads in the OSM
data.  But it varies, in some areas there is a LOT more detail in Canvec
data, while in others the OSM data is better.

If you're familiar with the data in the area and are seeing the CanVec to
be of higher quality and its meshing up with the GPS traces, then I'd say
replacing the existing data is the best bet.

I ran into this in rural Manitoba; the existing minor roads (ie farm
roads, etc) are marked with yahoo as the source.  In rural MB, yahoo is so
low resolution you can hardly SEE the roads on the satellite imagery its so
low resolution.  Its not surprising that canvec is quite off from these
roads.  In this situation I've just deleted all the Yahoo roads and used
the Canvec data.

Tyler