EXACTLY...

Hurrah Marc for posting some sense in here.


Marc Ramsey wrote:
Ramy wrote:
Marc, although I decided to stay out of this discussion (and any other
discussions on RAS), and ignore any pathetic comment from Al, I see
the need to steer it to the right direction. I don't think it matters
what Strepla or SeeYou reports which may indeed not be accurate, what
matters is what you see when you plot the trace on a sectional. I am
not familier with Strepla, but SeeYou has the option to download
sectional maps, so you can clearly see if there is a violation. I would
expect the SSA will use the same method.

Ramy, I worked for many years implementing GIS and CAD applications.
One absolutely does not want to use scanned charts to define "official"
airspace boundaries. It is quite simply impossible to achieve accurate
registration across an entire chart. There are also no guarantees as to
the source and integrity of the data supplied with Strepla, SeeYou, or
any other program.

If the SSA will be checking airspace boundaries for OLC, badge, and/or
record flights, the only correct approach is for the SSA to publish an
official SUA data set which will be used for a specific period of time,
along with software that can be used to verify IGC files against that
data. Any other approach leaves room for precisely the kind of dispute
that is taking place here.

Marc