What object(s) is the altitude legend in the app representing?

[vantage]

The AirNav app has a legend for "Altitude (in ft)" with color codes to decode altitudes. However nothing in the display is color coded. It can't be altitude of the land since no land mass is above 50K feet. It's been like this for months and possibly years. Altitude of A/C is displayed in text if that option is enabled.

[Runway 31]

What app, V6?

Can you maybe offer a better description of your issue as your screenshots dont show

Certainly not land hight

Alan

[vantage]

Details:
This is on an iPhone. iOS version 26.2 which is the latest available.

AirNav Radar app, version "3.2.4 (20220961)."  It is the latest version available on the Apple App Store.

The altitude legend (circled in red) shows how to decode the altitude of some thing(s) in the AirNav Radar app display. What things?

It's not the altitude of any aircraft. It's not the altitude of anything on the ground like mountains, hills or terrain. What is supposed to be displayed on the AirNav Radar app and be color-coded using the red-circled altitude legend?

[Runway 31]

Sorry, nothing showing

Alan