Oh thanks i found them by looking at the flight numbers in your links. Strangely, you don't seem to be able to get to the photos from the actual links themselves, or at least i couldn't find a way.
That's a shame about Eppynt. At least oliver's mount was saved. The problem with road racing footage being shown on eurosport here though is they only show highlights, not the whole race, so you can't get much of a feel for a race, i don't really like watching highlights for this reason. Even for motorcycle world endurance on eurosport, they show only part of it - for that you can get away with missing parts but they don't even show the start of the race and the first hours or so, so it ends up feeling pointless to bother watching.
So, i have been looking for the netherlands and it is hard to find stuff, it seems most of their data is hidden away and that that is available is expensive.
Covered here is Zandvoort
, both the street and normal ciruits.
First, the zandvoort street circuit of 1939:
I don't know when these oblique aerials were taken exactly, i can't see it listed.
This is before all of the roads for the circuit began construction:
Then, as they had started to be constructed:
There might be more of use here, i don't know: https://noord-hollandsarchief.nl/
Information about it:
Now there is this site that has RAF photos from the war and later in reasonable (but not full quality) scan detail: https://library.wur....y/geoportal/raf
10th of september 44:
18th of september 44:
6th of october 44:
7th of april 45:
As you can see, the old street circuit is fully visible although the turn from Burgemeester van Alphenstraat onto Van Lennepweg may have been changed and it looks like things have been destroyed etc, so it's hard to know exactly how it was in 39 for the races themselves.
One interesting thing that i didn't know that you can clearly see in the photos is that parts of the zandvoort circuit (in fact, a lot of the parts that no longer exist) were constructed by the germans as communication roads in the war.
You can also see the small wood that the circuit ran through in its early days (i don't know if it was late 50s or early 60s it was chopped down).
I don't know if they modified these roads at all when they made the actual circuit but certainly it can't have been a lot.
Now we get onto the site that has the data for sale. It appears students and staff of the university can request scans for €1 each https://www.dotkadata.com/tarieven/
otherwise you must pay extortionate costs.
The previews you can view are apparently only 150dpi and show you little. Purchasing will give you access to scans of 1200dpi but even this seems quite low in comparison to other sites i have seen. Still, probably a lot more usable. Anyway, on to the photos. You're best off right clicking on them, then pressing view image and zooming in manually.
As you can (barely) see, some of the roads for the street circuit do not appear to be built yet. Although it could be the low resolution.
As you can see, the wood remains, as do the football pitches or whatever they are.
Finally, here are some oblique aerials of the circuit from 1973:
I can do assen if you like and any other dutch circuits anyone is interested please say. However for assen, only dotka data is available that i have found so far, so you won't be able to see much.
There is this interactive map of Flevoland and some surrounding areas that has different parts for a few decades, however i am not aware of circuits in the region:
I wonder what the dutch equivalent of the ordnance survey is and what archive of aerial photos they have.