Isn't that a procedure for a specific airfield? We do not (currently) map airfield-specific circuits and joining procedures.

No, 'he' is refering to: http://www.ais-netherlands.nl/aim/2015-07-09-AIRAC/eAIP/html/graphics/eAIP/EH-AD-2.EHGG-VAC-5.pdf

I think he was referring to this image taken from AIP ENR1.2 Section 8,2 (although the argument as to whether this requires a separate join type from the 45 degree join still applies)

The Standard Overhead Join in SkyDemon is the UK join. The link you gave doesn't actually link to a specific page, could you tell me where exactly you're looking please?

Hi Tim,

An example of an overhead procedure is on this chart: http://www.ais-netherlands.nl/aim/2015-07-09-AIRAC/eAIP/html/index-en-GB.html

The meaning behind my comment was that the 'standard' overhead join was not selectable for Dutch (and ...) airports. It's already in SD available, so why restrict this to certain airports or countries?

We may introduce other join types in a future version but our goal certainly isn't to list all possible joins. The tool is just designed to help pilots with orientation. Certainly if we show a 45 degree join that will serve as sufficient orientation for a 90 degree join, I would hope.

What sort of overhead join do the Dutch sometimes ask for? Is there a diagram somewhere?

The shaded area on the dead side indicates the dead side.

Some comments on the circuit feature:
- I cannot select an overhead join for Dutch airports, ATC asks sometimes for this joining.
- the standard downwind join in NL iis midfield 90 degrees, this is not selectable. http://www.ais-netherlands.nl/aim/2015-06-11-AIRAC/eAIP/html/graphics/eAIP/standaardcircuit.jpg
- What is the purpose of the magenta 'mirror circuit' on the dead side?

I've heard it used reasonable frequently when pilots approach from the dead side.

Seems like there's a few people doing it.

http://forums.flyer.co.uk/viewtopic.php?f=1&t=6898&start=0

http://www.pprune.org/private-flying/302811-where-do-you-join-crosswind.html

Personally I'm not that fussed just observed it wasn't on the list and it is definitely a join I've been shown and observed others using it.

I'll ask again: where is a crosswind join commonly used?

yeah I realise that.....but it is modified and therefore different.