[Talk-ca] Duplicate overlapping roads...

[G. Michael Carter]

Since I've had 100% accuracy to my known areas on CanVec data (well 
within 5 metres anyways) I'd tend to trust it, over a change to GeoBase 
data that has no supporting GPS Tracks. :-)

I am comparing it to the GPS tracks as I go, but like I said there is 
many areas where there is no GPS tracks to follow.   Also, something 
I've noticed, CanVec data takes into account bends in the road where, in 
the areas I'm doing, GeoBase just has a straight line.  (Blind line in 
Orangeville is one such road)

I'm sure I'll probably replace some "more" accurate data somewhere, but 
the frequency should be pretty low, and with no supporting GPS tracks, 
or quoted source, how do we tell anyways?

Mikey


On 12/07/10 06:35 PM, Michael Barabanov wrote:
> My concern would be with 3. It is possible that someone has edited
> imported Geobase data after the import.
>
> On Fri, Jul 9, 2010 at 8:51 AM, G. Michael Carter<mikey at carterfamily.ca>  wrote:
>    
>> Sam always says I should let people know what I'm up to.   Today I'm
>> actually going to listen... ;-)
>>
>> I'm working in three areas currently, outward in circles around: Orangeville
>> (040P), Pickering (030M), and Rock Point PP (030L).   (and trying to pull in
>> Lake Ontario shore line)
>>
>> I'm creating some duplicate roads, temporarily, in the process.   I wanted
>> to detail my process here in case anyone notices them and starts scratching
>> their head.
>>
>> The process I'm following:
>>
>> 1.  Remove all existing OSM objects from CanVec grid.  (mostly stuff I've
>> already uploaded)
>> 2.  Merge with existing OSM data on the layer.
>> 3.  Delete any "attribution:GeoBase highway=*" roads.  Trying to preserve
>> any roads that CanVec doesn't have but it's hard since a lot of the areas
>> I'm doing don't have any GPS tracks.
>> 3a.  Where the duplicates come in... I'm leaving any roads that go off grid,
>> at least to an area I haven't processed yet.  Then when I get to that area I
>> remove/merge them.
>> 4.  Go over the area and merge/delete any roads manually added or that have
>> no source (where no GPS track)
>> 5.  Merge any duplicate objects, that I missed or previously existed.
>>
>> Areas I'm staying away from: Toronto!  I'm not going near that one, too much
>> existing or conflicting data.  I'll let someone living in Toronto to pick up
>> that mess. :-)
>>
>> Mikey
>>
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>>
>>      


-- 
*G. Michael Carter*
Contact: H: 1-519-940-8935 | W: 1-905-267-8494 | M: 1-519-215-1869 | F: 
1-519-941-0009
Google Talk: xmpp:mikeycarter1974 at gmail.com

<http://www.openstreetmap.org/?lat=43.9216&lon=-80.105&zoom=14&layers=B000FTF> 
<http://livedvd.carterfamily.ca/>
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