Hi there,

even if myself did not encouter severe issues within Germany yet there are some very bad vibrations on SD chart accuracy especially in Italian and German charts. Compared to physical ones there is a deviation between for example location of CTRs/ED-Rs/VFR routes and so on thus you cannot rely on that.
You can find more detailed info in a German forum of the very well known magazine "Pilot und Flugzeug" unfortunately only in German language:
https://www.pilotundflugzeug.de/forum/2014,01,31,21,3039439

It is worth reading it because many German pilots are building their opinion upon that and the most important thing of a moving map is accuracy in charts. I think articles like this one prevent thousands of potential users subscribing to SD. Therefore please focus on accuracy instead of features as the tool from that perspective is leading egde so far...

Having that said I will always compare my tracks against physical charts and will report any inconsistence.

Cheers,
joseffe

I must agree with this.

Thousands of European pilots rely on SkyDemon as their sole chart every day, and we know of no inaccuracies in our aeronautical data. Road and railway data is sometimes inaccurate (slightly out of place) but SkyDemon is not intended to be used for road navigation.

If you have specific feedback on our charts, this is the forum in which to share it (or contact us directly). A couple of people recently contacted us reporting "errors" in our Germany chart but they turned out to be incorrect. In fact it is often that national paper charts which are incorrect, and SkyDemon charts which are correct, since (among other things) ours are updated every 28 days.

I just read the entire thread linked above (via a translator) and can see no inaccuracies in the SkyDemon aeronautical database mentioned.

Could someone please correct me if I am wrong? The only thing I see is the correct observation that sometimes our road data is offset from reality.

If somebody in the SkyDemon office spoke German we would get involved in the thread, but unfortunately nobody here does.

Hi Tim,

Thanks Oliver for the clarification. As we do not currently have a better source of roads and railways in Germany, we have annotated the option to turn them on and off (they are off by default) with the text "Not accurate for aeronautical use". Hopefully this will tell people that we know this data to be inaccurate, and reinforce that the other data IS accurate.

Hi Tim,

Lakes and rivers may be slightly off too. Towns are as precise as anywhere else.

I thought OpenStreetMap data would be quite accurate and freely available.




-- Chris.

It is, but it is not suitable for use as a source of medium-scale transportation data (roads and railways). It is simply too detailed.

We are investigating in the background whether we can do any processing of OSM data (or pay someone else to do it) to make it suitable for our needs.