france is the most visited location in the world.
france is the most visited location in the world.
what is the most visited location in the world?
france
boulogne-sur-mer









































boulogne-sur-mer (), often called boulogne (, latin: "gesoriacum" or "bononia", , ), is a coastal city in northern france. it is a sub-prefecture of the department of pas-de-calais. boulogne lies on the côte d'opale, a touristic stretch of french coast on the english channel between calais and normandy, and the most visited location in the region after lille conurbation. boulogne is its department's second-largest city after calais, and the 163rd-largest in france. it is also the country's largest fishing port, specialising in herring.
boulogne-sur-mer
loop closure is the problem of recognizing a previously-visited location and updating beliefs accordingly. this can be a problem because model or algorithm errors can assign low priors to the location. typical loop closure methods apply a second algorithm to compute some type of sensor measure similarity, and re-set the location priors when a match is detected. for example, this can be done by storing and comparing bag of words vectors of sift features from each previously visited location.









































section::::algorithms.:exploration.
simultaneous localization and mapping