SkyDemon Forums

Improving accuracy of road network in South Africa

http://forums.skydemon.aero/Topic34629.aspx

By Still_Learning - 6/16/2022 1:13:02 PM

Thanks Tim.  The update is a definite improvement, but still some anomalies.
1. Seems that motorways are being classified erratically - eg with only Motorways showing the below appears:

With all roads the gaps are filled in see below:


A number of disconnected road segments here:


The N3 - a major national road - changes colour for some reason:
... and then back again:

And then final Q is on showing the road names - they seem to appear at certain scale, but not consistently - is there a way to toggle them on demand.

Cheers
Andrew


By Tim Dawson - 6/17/2022 10:51:24 AM

Yep, OpenStreetMap data is terrible in many ways, you've illustrated some there. It's the only data I've managed to find so far though, so we either accept it, or revert to the old basic data.

Road labels do appear only at certain scales and for certain road classifications. You'd have to give a specific erratic example for me to comment further.
By Still_Learning - 6/19/2022 1:40:29 PM

Tim Dawson - 6/17/2022 10:51:24 AM
Yep, OpenStreetMap data is terrible in many ways, you've illustrated some there. It's the only data I've managed to find so far though, so we either accept it, or revert to the old basic data.

It's definitely an improvement.  What format do you need the road data in?  Perhaps I can ask the community in SA if anyone has access to other data.  On the OSM website it does show correctly, so must be linked to how the data is structured?
By Still_Learning - 6/19/2022 3:31:00 PM

Hi Tim...
I've spent some time looking at the OSM data structures in GEOJSON, and think I'm making some progress.  Is there an easier way I can communicate with you other than through the forum?
Thanks
Andrew
By Tim Dawson - 6/27/2022 11:11:02 AM

OSM data is too detailed to be appropriate for small-scale or aviation charts, so requires quite a bit of processing to be suitable for vector maps like ours. I can see you've sent me an email, which I'll reply to in due course.
By Still_Learning - 2/12/2022 3:39:11 AM

Hi
Is there a way to improve the representation of the road network in South Africa (not sure about other regions eg. in Europe)?
For example, on the below image the N1 highway - the longest highway in SA connecting Johannesburg and Cape Town - ends unceremoniously in a field 30 km outside Johannesburg.  Labelling major roads and/or applying colour for major roads would also be very helpful. 
Highways and highway intersections are very useful in flight planning.



Cheers
Andrew

By ZWPilot - 7/12/2022 8:04:11 AM

Please don't forget us guys north of the Limpopo.
I have tried several times to send updates for airspace, airfields and errors for Zimbabwe to SD but it seems we seldom get any joy.
I am lead to believe there is a designated person handling the Africa region but have never found out how to contact them.