As a result of its underlying algorithms, the Isovist_App does not define a moment when a field is ‘completed’. Instead it iterates continually, with results rapidly attaining statistical and visual stability (Psarra & McElhinney, 2014). Counters allow the user to monitor local and global calculation progress, as does a ‘sample flux’ figure, representing the ‘evenness’ of sample location distribution. All of the resulting fields adopt a default representation that grades from the highest value in red, through orange, yellow, green, and blue to the lowest value in blue-purple.

Users of the Isovist_App can view progress in real time, allowing for consideration of results whilst they attain a consistent state. The latter, not entirely incidentally, makes watching the Isovist_App in action both enjoyable and educational too.