[talk-au] The trouble with tracing

[Nick Hocking]

Good tracing is quite helpful in the final definition of a way,

Bad tracing is really bad  - it takes a multiple of the original effort to
correct it.

Ok - having resolved that, I believe that the difference between good
mapping and bad
mapping will be absolutely correlated to the number of "one way" errors and
"turn restriction" errors.


In order to say that a route from Street A to Street B is possible you must
have actually done it yourself.
It's not good enough to have just passed along a nearby cross street, to
snaffle the street sign name.

For entitys that need to be routable, you *must* actually travel that route
to verify it's correctness.

PS - you can't read a "No Right Turn" sign from a satellite and you're not
allowed to use Google Steet Views.
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