I am just trying out the Free Trial of SD.

Here in southern Germany I am unable to see the standard Airspace C starting at FL100.
I can see C starting at FL130 in the alpine area, but not the standard C in the flatlands.

Same goes with airspace E. Visible when the lower limit is off-standard (like 1000ft)
but not when standard (2500 ft).

What am I doing wrong? Thanks a lot!

(and yes, I have well planned a route high enough - currently FL150)

Tim, that's almost the solution I suggested in a previous post. If you now could just add the airspace to the list shown when you do a "what's here" I'd be a happy camper.

Greetings, -- Chris.

Just as an aside to Tim:

You might have already done this, but optimizing your hit testing algorithm might gain you some performance improvements. You do have an advantage about normal hit testing. Namely, you can assume that your point in question moves on a continuous line at a certain maximum speed. So a tiered algorithm -- giving you rough estimates blindingly fast whereas taking a bit longer if you want to know accurately -- might be beneficial. One might imploy a ranked list of airspaces that are most likely to change their status.

-- Chris.