[Talk-ca] Fwd: Re: CanVec import troubles

[Adam Dunn]

Sam: I'll take one of the "water" relations as an example. What you would do
is: delete the tagless ways that are currently in OSM and would be linked by
that relation (the ones you had uploaded a week or two ago). This includes
deleting the outer way (the way that represents the outline of the lake),
and the inner way (that surrounds an island). Then make sure to copy the
relation in its entirety and paste that into the OSM layer and upload. Then
run Validator on the data (you can make a selection box around the way so
that Validator will only run on that portion of the data and not the whole
layer). You will get "duplicate node" errors because the newly copied water
relation ways could share nodes with "wood" or "wetland" ways that you have
already uploaded. Merge these nodes, then you should be ready to upload.

The situation is not quite this easy, however. It looks like you (sammuell)
uploaded tagless ways on Sep 12 (take a look at
http://www.openstreetmap.org/browse/way/77328097). Then a bot/human (efred)
went through and deleted duplicate nodes on Sep 15 (again, way 77328097
mentioned above). Then on Sep 19 you uploaded another copy of the same
tagless way again (http://www.openstreetmap.org/browse/way/78124481). So now
there are two copies of these tagless ways in OSM. You will need to delete
both of them from OSM before uploading the proper relation.

I see also that you did not delete the original water body that was uploaded
to OSM two years ago (traced from landsat satellite imagery). Normally you
will delete this original way when uploading the better Canvec data (unless
you are working with some huge lake. If you're working with a large lake
that will take several days or weeks to replace with Canvec, then you want
to "split" {select a node or two then "Tools->Split Way"} the lake at the
borders of the Canvec data you are working with, delete the old data that
overlaps with the new Canvec data, and join the new Canvec data to the old
OSM data (merge nodes and combine ways but this can be quite a complex
process especially if you're merging a basic way from the old osm to a
relation in the new canvec).

It looks like some of these problems (like not selecting the whole relation)
is just a matter of experience with Josm. This will come with practice. It
wasn't until about 6 months ago that I figured out relation editing myself,
and I'm still finding little discoveries in Josm. Only two days ago I
figured out how to use "Join overlapping areas" properly, and it's made me
10% more efficient when importing Canvec on very-sparse areas. Play around
with Josm and learn from your mistakes and things will get easier.

Adam

On Mon, Sep 27, 2010 at 7:20 PM, Samuel <samueldyck at gmail.com> wrote:

>
>
> -------- Original Message --------  Subject: Re: [Talk-ca] CanVec import
> troubles  Date: Mon, 27 Sep 2010 21:19:49 -0500  From: Samuel
> <samueldyck at gmail.com> <samueldyck at gmail.com>  To: Adam Dunn
> <dunnadam at gmail.com> <dunnadam at gmail.com>
>
>
> Hi
>
> So how would I replace the previously uploaded data with fresh CanVec Data.
> I can't seem to get rid of the old data without cauing conflicts.
>
> Sam
>
> On 10-09-25 06:43 PM, Adam Dunn wrote:
>
> On Sat, Sep 25, 2010 at 1:31 PM, Tyler Gunn <tyler at egunn.com> wrote:
>
>> I'm not 100% sure what happened with the Canvec data you uploaded, but it
>> looks like the tags are missing from lot of the ways.  The wooded areas are
>> not showing up because they're not marked natural=wood, and the watered
>> areas are not showing up water because they're not marked natural = water.
>>
>
> Were these areas originally relations? Remember that to select a relation
> (including the tags) in Josm, you have to double-click on the relation in
> the relation list, or select it in the list and click on the dotted square
> button, or right-click the relation in "Member of" and select the relation.
> Simply highlighting the way is not sufficient. It sounds like this is what
> may have happened.
>
> Adam
>
>
>
>
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