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[aWac9]

I was wondering why in similar latitudes there are different visibilities within outerra.
conditions F11 are identical but it seems that in one there is a dense or polluted atmosphere that does not allow to see or have vision.
why
An example
1º. Pokhara with the Himalayas in the background
2º. Tepuy in the Venezuelan Amazon.

[cameni]

It's physical.
Visibility is limited by haze, and haze mostly depends on the sun angle. Haze is produced by sun rays that get scattered into your view (in-scattered), obscuring the reflection from terrain (which also get attenuated by out-scattering).


(see https://software.intel.com/en-us/articles/ivb-atmospheric-light-scattering)

Low sun angles scatter more, producing more haze.
Lower altitudes have denser air → again more in-scatter and resulting haze.

To compare visibility you'd have to provide similar conditions not just for the latitude, but also for the local time of day (solar time) and elevation.

[aWac9]

Thanks for answering Cameni.
still in the Amazon I can not get clear vision in any of the angles. I will study it.