When you calibrate a building, you draw a virtual path that connects all the calibration points. This path contains the points where Situm Mapping Tool has captured the WiFi/BLE readings.  For example, the following image represents as blue dots the points where Situm Mapping Tool has recorded a WiFi reading.

Situm Mapping Tool allows you to modify the Path Width, which represents the width of the virtual paths that you draw when you calibrate. This width has a direct effect on the space that you will cover with each calibration: the wider the path, the farther each calibration point will have influence. The difference is clear in the following image. When we set a Path Width of (1) 3 meters, the influence of each point is limited. However, with a Path Width of (2) 12 meters,  we cover more areas with less calibration effort. Be wary, because this usually comes at the expense of a inferior positioning accuracy.  

Adjusting the Path Width to the right number

Finding the right Path Width may be tricky. As a rule of thumb, the Path Width should be approximatelly equal to the width, in meters, of the building's narrowest hallways.  Examples:

• In a supermarket, the path width should usually be low (e.g. 1-2 meters). Otherwise, signal points from different aisles could be mixed, reducing the chance of positioning the user in the correct aisle.  
• In a shopping mall, the path width can usually be larger (e.g. 3-10 meters), since the corridors are wide and widely separated.  

As shown in the following image, this allows you to calibrate always in the middle of the corridor and increase the path width until it covers the whole corridor.  

Another option, useful if the corridors of your building are too wide (e.g. more than 10 meters), is setting a lower Path Width and calibrating the sides of the corridors as shown in the following figure (1). This way, (2) you will cover the whole corridor with a lower Path Width, which will increase the accuracy.

Tricky Situation #1: Obstacles

Sometimes, you will you calibrate areas (e.g. open spaces) that contain elements that the users can not traverse (e.g.  a bench, an escalator, etc.). You should avoid calibrating over those elements, because otherwise Situm will provide locations on top of them (which is wrong).

In addition, when adjusting the Path Width, you should take care not to cover the space covered by those elements: otherwise, Situm may provide locations on top of them, which should not be possible.

Tricky Situation #2: Rooms

In case you are calibrating rooms or areas sepparated by walls, you may want to distinguish the side/room where each user is. A small path width will allow you to do this (1), although you may need to perform more calibration passes to cover the whole space. On the contrary, (2) if you increase the path width too much, you may end up connecting both sides of the wall (both rooms) together, and Situm will treat that area as an open space.