That 's easy if you kept your original logs. Do a WiGLE query for AP's found only by you with a zero as the coordinates. Now you have the MAC addresses and search your logs for that MAC. If that log has any with GPS then you have an idea where to start.
I keep a trace of every drive from day one so it's easy. Note that my ratio of networks with and without GPS is pretty low. 378,080 with out of 405,676 = 85.8%. That's because I go back and get them using the above technique. Start now, and it will make a big difference as your numbers grow.
Actually your ratio is much better than 85.8 %.
Remember that 405,676 networks you refer to in the above calculation, is all the networks you have seen, including those that was first detected by others and those you have detected without coordinates. The 378,080 are networks with GPS data, that you have been the first to detect.
For example I've seen a total of 86,069 networks. Of those 86,069 networks I was the
first to detect 80,056 with GPS data.
That leaves 6013 networks unaccounted for, but in order to calculate a correct ratio, I need to know how many of those networks are without gps data, and that information is not available. Those 6013 networks are made up by a sum of :
Networks with GPS detected first by others and then seen by me with or without GPS + networks without GPS first detected by others and then seen by me without GPS as well + networks first seen by me without GPS.
I've shown you how to pull down the data you have uploaded, and from that you calculate and then take the last item out of the equation - the number of networks first seen by you but without GPS data. The two other parts of the equation are unknown.
In my case, I have 1028 networks without GPS data uploaded that was first seen by me. Using that as the basis for a ratio, gives a more correct figure IMHO. That would give me a ratio of (80,056 + 1028)/80,056*100 = 98.7%.
Using your calculation, I'd have a ratio of 93.0 %
Dutch