UISIC mapping workshop at Kerrville

[Andy Waddington]

Sometime before sending, Philipp Häuselmann typed (and on Wednesday 2009-04-29 sent):

> ... the upgrade or abolition of grades "that should not be used".

That's not quite what they are. They are grades that should not be what you
**intend** to use, but can be used to indicate a lower survey quality when
you are aware that you failed to achieve the intended grade. As such, they
do fulfil a useful function and abolishing them would mean that a marginal
failure to attain grade 5 (for instance) would result in a survey labelled
as grade 3 which would not be a fair assessment of its real accuracy/precision.
If you abolish the intermediate grades, people will be less willing to admit
to having failed quite to achieving the intended grade and will just label
things as grade 5 when they aren't - this is potentially more serious.

Keep the grades that you should not set out to use !

Andy