[OSM-newbies] Trust GPS or Yahoo aerial imagery?

[Dave Clark]

To be fair, the "consistent" error in question was only one track.  I 
assumed that all the tracks in the region were consistently skewed in 
relation to Yahoo.

I'm a lone mapper (at least I was the last time I checked) I don't have 
a dozen other people criss-crossing my region that I can use to estimate 
my GPS's drift - I have to trust my GPS over the images because those 
are the only two data sets I have available to me.

For you guys doing detail work in well tracked areas, it may be a 
different story. But for those of us who are laying down the initial 
tracks on a completely blank canvas, we  don't have the option of 
trusting outside imagery over our own data.



"Maps are not meant to be precision lookup thingies, they are meant to 
be big overviews, as good as possible."

Boy is THAT true.  I use a 3 year old maps on my PocketPC version of 
TomTom - the maps for virtually every housing allotment built in the 
past 15 years is skewed to the point that automatic navigation is 
completely impossible.  But, if I view the maps directly, the streets 
appear OK relative to eachother: Turn left into the allotment, turn 
right on HomeOwner Lane, and another right on Colorful-Imagery Way.