The description of the ‘Spyglass’ technology says it increase scout LOS by 30%. But this is not true. As can be seen in the below comparison, the radius of the Scout’s LOS increases from around ~10 tiles to around 16-17 tiles - a 60-70% increase. Either the description or the effect is wrong.
If the radius is increased by 30%, then the area is increased by 69%, because 1.3* 1.3 = 1.69
Did you look at the image? The RADIUS is increased by way more than 30%. It corresponds to an area increase of closer to 150%.