When performing RF site surveys, it's beneficial to plot signal strength or SNR on a map of the facility. Many of the RF site survey tools interface with GPS to make this mapping possible, but GPS is only effective outdoors in relatively open areas. Helium Networks has an interesting approach to mapping your position indoors when performing an RF site survey. Their tool is called Rollabout, and it keeps track of position from the wheels of the cart that you push around the facility.

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