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<DIV>"if you derived the vectors from GPS<BR>traces, its best to upload them to
OSM - so that we have "proof" that<BR>you actually went out and did the leg work
"</DIV>
<DIV>By the same token, I don't know the particulars on OSMs arrangement with
Yahoo imagery, but aligning to distortions that are specific to that dataset at
some point will be your "proof" that your work was performed to that source. If
that source becomes unavailable or fee based that could present a problem.</DIV>
<DIV>Lewis</DIV></BODY></HTML>