Wonder why Europe has so many more photograph density than the US. Just correlating with higher population density?
The average population density of western europe is much higher than the average population density of even the eastern USA. Coupled with the fact that there is a lot more 'older' stuff there, whether castles, old battlefields, churches, you name it, it's not surprising there are a lot more tourist photos being taken. The average European city is a lot more photogenic than the average American or Asian city (clearly…
We have to talk either about tourists motivations or the effect of the difference between the camera position and the target position in density maps relevance.