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.<br>
<br><div class="gmail_quote">On Mon, Jul 12, 2010 at 8:24 PM, Michael Barabanov <span dir="ltr"><<a href="mailto:michael.barabanov@gmail.com">michael.barabanov@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
forgot talk-ca<div><div></div><div class="h5"><br><br><div class="gmail_quote">On Mon, Jul 12, 2010 at 8:24 PM, Michael Barabanov <span dir="ltr"><<a href="mailto:michael.barabanov@gmail.com" target="_blank">michael.barabanov@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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).<br>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.<div>
<div></div><div><br>
<br><div class="gmail_quote">On Mon, Jul 12, 2010 at 7:25 PM, G. Michael Carter <span dir="ltr"><<a href="mailto:mikey@carterfamily.ca" target="_blank">mikey@carterfamily.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">
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. <span><span>
:-) </span></span><br>
<br>
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)<br>
<br>
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? <br>
<br>
Mikey<div><div></div><div><br>
<br>
<br>
On 12/07/10 06:35 PM, Michael Barabanov wrote:
<blockquote type="cite">
<pre>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 <a href="mailto:mikey@carterfamily.ca" target="_blank"><mikey@carterfamily.ca></a> wrote:
</pre>
<blockquote type="cite">
<pre>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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