<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>Hello,</DIV>
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<DIV> My name is Regie Alam, from Ottawa. This is my first post on the list although I've been receiving the messages for quite some time now.</DIV>
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<DIV> I am just wondering if there is an accepted protocol for ground truthing the data (Canvec, etc.)? I would find it interesting doing some ground truthing.</DIV>
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<DIV>Regie</DIV>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> "Bégin, Daniel" <Daniel.Begin@RNCan-NRCan.gc.ca><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> G. Michael Carter <mikey@carterfamily.ca>; talk-ca@openstreetmap.org<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Tue, July 6, 2010 1:50:53 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [Talk-ca] Accuracy of CanVec vs Yahoo?<BR></FONT><BR>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=120273217-06072010>Bonjour Michael</SPAN></FONT></DIV>
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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=120273217-06072010>About accuracy: Canvec should usually be better than 10m (90%) for road network and 30m for other features. We know that Yahoo imagery often have offsets. However, </SPAN></FONT><FONT face=Arial color=#0000ff size=2><SPAN class=120273217-06072010>you better have plenty of gps tracks to take a decision.</SPAN></FONT></DIV>
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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=120273217-06072010>By the way, there is no park boundaries in Canvec product -for the moment.</SPAN></FONT></DIV>
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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=120273217-06072010>About contents: Yahoo imagery is usually more up-to-date than Canvec - except for road network and for hydrography in some provinces.</SPAN></FONT></DIV>
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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=120273217-06072010>I agree with Richard, the details always matter. You may sometime have to choose between accuracy and completeness...</SPAN></FONT></DIV>
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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN class=120273217-06072010>Daniel</SPAN></FONT></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> talk-ca-bounces@openstreetmap.org [mailto:talk-ca-bounces@openstreetmap.org] <B>On Behalf Of </B>G. Michael Carter<BR><B>Sent:</B> 6 juillet 2010 12:12<BR><B>To:</B> talk-ca@openstreetmap.org<BR><B>Subject:</B> [Talk-ca] Accuracy of CanVec vs Yahoo?<BR></FONT><BR></DIV>
<DIV></DIV>When importing the data do we favour yahoo existing data in OSM (which is obviously traced from satellite imagery) or CanVec? I'm assuming CanVec for parks would be based on official park boundaries rather than yahoo, line of site on open spaces. So parks would be better coming from CanVec. But what about buildings?<BR><BR>Mikey<BR><BR><BR>
<DIV class=moz-signature>-- <BR><FONT size=2><B>G. Michael Carter</B><BR></FONT><FONT face="Verdana, Arial, Helvetica, sans-serif" color=#666666 size=2>Contact: H: 1-519-940-8935 | W: 1-905-267-8494 | M: 1-519-215-1869 | F: 1-519-941-0009 <BR>Google Talk: <A rel=nofollow>xmpp:mikeycarter1974@gmail.com</A><BR><BR></FONT><A href="http://www.openstreetmap.org/?lat=43.9216&lon=-80.105&zoom=14&layers=B000FTF" target=_blank rel=nofollow><IMG src="cid:1.440516462@web112808.mail.gq1.yahoo.com" border=0></A><A href="http://livedvd.carterfamily.ca/" target=_blank rel=nofollow><IMG src="cid:2.440516463@web112808.mail.gq1.yahoo.com" border=0></A> </DIV></DIV></DIV>is </div><br></body></html>