deletions | additions       diff --git a/Placing_the_grid_at_an__.tex b/Placing_the_grid_at_an__.tex  index 01a1362..f84a091 100644  --- a/Placing_the_grid_at_an__.tex  +++ b/Placing_the_grid_at_an__.tex 
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Placing the As shown in experiments placing a  grid at an angle compared to the room walls (see fig.~)  may help preventing  to avoid moving move  along the lines between the tags (areas tags, which are areas,  where a tag might not be detected). Alternatively detected. Alternatively,  this may be solved by making the grid tight enough. enough but with a higher number of tags and more expenses as well.