[Talk-ca] Duplicate overlapping roads...

[Michael Barabanov]

Another typical post-geobase exercise is to connect to existing roads and
fixing connectivity problems otherwise. This is really important for
routing, e.g. in Garmin GPS. I for one spent quite a bit of time doing this
for my area.  I guess the upshot is: be careful when deleting data that
could have been manually adjusted.

On Mon, Jul 12, 2010 at 8:24 PM, Michael Barabanov <
michael.barabanov at gmail.com> wrote:

> forgot talk-ca
>
>
> On Mon, Jul 12, 2010 at 8:24 PM, Michael Barabanov <
> michael.barabanov at gmail.com> wrote:
>
>> GPS tracks aren't the only source.  There's also Yahoo.  There's local
>> survey (for things like oneyway=yes that isn't present in geobase).
>> Also, some people choose not to upload GPS they used for editing.  I think
>> a good idea would be to see if the import was the last edit for the data to
>> be deleted, or if there were edits done after the geobase import.
>>
>>
>> On Mon, Jul 12, 2010 at 7:25 PM, G. Michael Carter <mikey at carterfamily.ca
>> > wrote:
>>
>>>  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> <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
>>>
>>> _______________________________________________
>>> Talk-ca mailing listTalk-ca at openstreetmap.orghttp://lists.openstreetmap.org/listinfo/talk-ca
>>>
>>>
>>>
>>> --
>>> *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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