Agreed. Also consider reading this page: http://wiki.openstreetmap.org/wiki/Armchair_mapping
On the other hand, I know many of us travel a lot around the country so I assume we know the basic highway class to trace. If in doubt, use the highway=road tag. On Feb 8, 2012 11:44 PM, "Eugene Alvin Villar" <[email protected]> wrote: > Hi guys, > > With all of the new Bing imagery that's available, I'd like to remind > everyone to be careful with unaligned Bing imagery. > > Here's an example showing how two different satellite images are not > aligned with each other (look at the LBC roof sign): > > http://mvexel.dev.openstreetmap.org/bingimageanalyzer/?lat=14.517377504551362&lon=121.00218251959474&zoom=18 > > Obviously, one (and likely both) of the images is not positioned > correctly. This shows that Bing's imagery (and even Google's) is not > always aligned or positioned very accurately. There may be an offset > of up to 10 meters. > > If there are multiple GPS traces in the area, you should use them to > align the satellite imagery first before tracing buildings, roads, and > other features. You can average multiple GPS traces to get a good > enough positional accuracy and Potlatch, Merkaartor, and JOSM all > support manually moving the background imagery to the correct > position. > > If there are no available GPS traces, then it's acceptable to trace > the Bing imagery directly. Someone can realign the map later on when > GPS traces would become available. > > > For more information, please check out this e-mail that I sent last year: > http://www.mail-archive.com/[email protected]/msg02829.html > > > Happy tracing!!! :) > > _______________________________________________ > talk-ph mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-ph >
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