Hello Jan,

thank you for your feedback & your correction without discussion.

Do you really believe two small 85 x 3.5 & 19 x 1.5 meter ground areas covered with black nylon fabric qualify as a runway? Yeah, I guess mine is "quite incorrect way of mapping"...

https://wiki.openstreetmap.org/wiki/Tag:aeroway%3Drunway
"A runway is a defined rectangular area on a land aerodrome (aeroway=aerodrome) prepared for the landing and take-off of aeroplanes."

Have you checked the definition of aeroway=airstrip?
https://wiki.openstreetmap.org/wiki/Tag:aeroway%3Dairstrip
"The aeroway=airstrip key is used to identify a place such as a farm field, hill slope or similar reasonably flat area where light aircraft can land and take off from, which does not have regularly scheduled service and has no permanent infrastructure such as terminal buildings. Airstrips are often limited to a particular type of aircraft."

Have you ever checked which kind of permanent installations this place has?