finished wifi. some todos left

tex/chapters/introduction.tex

@@ -1,4 +1,5 @@
 \section{Introduction}
+\label{sec:intro}
 
 Setting up a localization solution for a building is a challenging and time-consuming task, especially in environments that are not built with localization in mind or do not provide any wireless infrastructure or even both. 
 Such scenarios are of special interest when old or historical buildings serve a new purpose such as museums, shopping malls or retirement homes.
@@ -9,6 +10,8 @@ The first 300 years, the building was initially used as a convent, and, after th
 Over time, the building underwent major construction measures and was extended several times.
 Since 1936, the \SI{2500}{\square\meter} building acts as a museum of the medieval town Rothenburg ob der Tauber \cite{Rothenburg}, Germany.
 
+\todo{Bild vom Museum?}
+
 Such buildings are often full of nooks and crannies, what makes it hard for dynamical models using any kind of pedestrian dead reckoning (PDR). Here, the error accumulates not only over time, but also with the number of turns and steps made \cite{Ebner-15}. 
 There is also a higher chance of detecting false or misplaced turns, what can cause the position estimation to lose track or getting stuck within a demarcated area. 
 Thus, this paper presents a very robust but realistic movement model using a three-dimensional navigation mesh based on triangles.