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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On the CanVec question – The CanVec road network data is or will
be identical to the GeoBase data. Right now CanVec is identical to GeoBase
but prior to some of the GeoBase updates. The data flow is provinces to GeoBase
to CanVec with processing / scheduling delays along the line. CanVec is
updated every 6 months or so and given processing times could be as much as 12
months behind GeoBase.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>The other difference to note is that the GeoBase data is continuous
while the CanVec data is cut at the sheet edges. The CanVec data carries
the GeoBase unique identifier on the road segments. When a segment is
split at the sheet edge both pieces will carry the same GeoBase identifier so
if you choose to use the CanVec data you might want to plan on merging segments
with common GeoBase identifiers. (There is also a CanVec identifier which
is unique to each segment piece so be careful about which you use.)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>A personal thought – Perhaps you could extract the list of GeoBase
identifiers from a CanVec data set and then use that to select the GeoBase segment
to add. It should be possible to deal with the duplicates fairly
easily. The main issue would be what to do with any GeoBase segments left
behind (these would be updates that have not made it to CanVec yet.)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Similarly the GeoBase hydro data currently in production will replace
the CanVec data once it is complete and the updates will be to GeoBase first,
then promulgated through to CanVec. This is the intention with future GeoBase
themes as well, as they are added. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On the ID question - The ID on the GeoBase objects is a permanent
ID. Attribute changes and positional updates (e.g. street re-alignments)
will not cause the ID to change.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoAutoSig><b><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-weight:bold'>Mike Mepham<o:p></o:p></span></font></b></p>
<p class=MsoAutoSig><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Federal/Provincial/Territorial Liaison<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>GeoConnections Program<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Natural Resources <st1:country-region w:st="on"><st1:place
w:st="on">Canada</st1:place></st1:country-region><o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoAutoSig><b><font size=3 face="Arial Narrow"><span lang=FR-CA
style='font-size:12.0pt;font-family:"Arial Narrow";font-weight:bold'>E-Mail:</span></font></b><font
face=Arial><span lang=FR-CA style='font-family:Arial'> <a
href="mailto:MMepham@NRCan.gc.ca">MMepham@NRCan.gc.ca</a> <br>
<br>
<o:p></o:p></span></font></p>
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<p class=MsoAutoSig style='margin-top:3.0pt'><font size=1 color=black
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color:black'>, <st1:State w:st="on">ON</st1:State> <st1:country-region
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0E9</st1:PostalCode></span></font></st1:place><font size=1 face=Arial><span
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color:black'><o:p></o:p></span></font></p>
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w:st="on"><font size=1 color=black face=Arial><span style='font-size:8.0pt;
font-family:Arial;color:black'>2208 Scarth Street</span></font></st1:address></st1:Street><font
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color:black'><o:p></o:p></span></font></p>
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w:st="on"><font size=1 color=black face=Arial><span style='font-size:8.0pt;
font-family:Arial;color:black'>Regina</span></font></st1:City><font size=1
color=black face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:black'>, <st1:State w:st="on">SK</st1:State> <st1:country-region
w:st="on">Canada</st1:country-region> <st1:PostalCode w:st="on">S4P
2J6</st1:PostalCode></span></font></st1:place><font size=1 color=black
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<p class=MsoNormal><font size=1 face="Times New Roman"><span style='font-size:
8.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
samvekemans@gmail.com [mailto:samvekemans@gmail.com] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Sam Vekemans<br>
<b><span style='font-weight:bold'>Sent:</span></b> December 15, 2008 04:12<br>
<b><span style='font-weight:bold'>To:</span></b> Mepham, Michael<br>
<b><span style='font-weight:bold'>Cc:</span></b> talk-ca@openstreetmap.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> re: GeoBase and
OpenStreetMap - welcome</span></font><span lang=EN-US><o:p></o:p></span></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi, <o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>1st off, thanks for joining in the group, i'm sure your help will be
most valuable.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I'll need a little bit (a couple days) to go over each of your points
with a more formal response.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>The only thing I didn't see is the relationship with the CanVec data,
(that I am currently exploring), making a chart showing the relation from this
dataset to how we look at it in OpenStreetMap. .. matching the labels, with
OpenStreetMap tags. For the import program to use.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>For now, thats my biggest question, as road and Hydro & Topo data
are also available CanVec. The question/issue raised was about update
frequency. Which one do we focus on?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>What is the other complete download of geobase data? I know that
1 of them from for the Ibycus topo. My guess would be OSGeo? <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>And for dealing with updates? We are planning on making a program which
is able to detect current points in the OSM database, which have the the same
attributes, and place the GeoBase (NRCan) ID onto it, and where no OSM data
exists, place this new GeoBase data onto it. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>(to talk-ca list: .. similar to how the renderer has a list of common
elements which the program knows how to read (and then creates the maptile),
the rest it avoids, or makes a note that there is an error and fills out a big
report)<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Our biggest assumption would be that the NRCan ID that is placed on the
data would not change, so that when more attributes are available ie. house
numbers, these attributes can be added onto the OSM database, provided it doest
aleady exist. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>So the program could essentially be run several times over, grabbing
different datafiles, going through the whole list of NRCan to OSM common
elements. (this way, different elements can be added at different times) ... so
only when when people are ready to work with it. As there will be some
manual adjusting, as tagging from both sides wont be perfect, and so this
program will be updated as people find errors.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>(ps. a timestamp, the date the NRCan data was added would be on of the
tags that the program would look at too, and perhaps the date of
the original source also. As this is a good point of reference)<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Does this make sense?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I know that it's technically possible to make such a program, it's just
a matter of finding the right people out there who can make it work. :)<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I will get back to you after i had a chance to go over your message in
further detail, so to answer all your questions. I'm sure others might
also respond too. (as this is an open discussion group).<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Sam Vekemans<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Across Canada Trails<o:p></o:p></span></font></p>
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