# STAT: Data Collection (with GPS)

> 1. Prepare a satellite image file (e.g. Google Map, Bing Map, OpenStreetMap, etc.) for the outdoor test site and rename the file using the following format:

>    > ‘<ID>$<lat1><lon1><lat2><lon2>.png’

>    > - <ID>: the map ID

>    > - <lat1>: the latitude correpsonding to the top-left corner of the satellite map.

>    > - <lon1>: the longitude correpsonding to the top-left corner of the satellite map.

>    > - <lat2>: the latitude correpsonding to the bottom-right corner of the satellite map.

>    > - <lon2>: the longitude correpsonding to the bottom-right corner of the satellite map.

>    Other image formats (e.g. .jpeg or .bmp) should also work.

>    6 decimal points for the latitudes/longitudes should be sufficient for most purposes.

> Note

> Example File Name:

> ‘newracom$33.673939,-117.760588,33.670314,-117.756668.png’

> Warning

> Double-check to make sure that the GPS coordinates are correct by cross-checking the coordinates with the original satellite map application (e.g. Google Map, Bing Map, OpenStreetMap, etc.).

> 2. Relocate the AP to a fixed location and power it on using a portable battery.

> 3. Connect the USB-GPS device to the STA and plug in the Ethernet adapter into the laptop. Use a LAN cable to connect the Ethernet adapter and the STA. Power on the STA.

> 4. Open the SWiSS application on the laptop and select STAT (Spatial Test Automation Tool):

> 5. Select the satellite map image file.

> 6. Select GPS and press CONNECT to start the measurement process. Note that logging is disabled by default.

> Note

> For the GPS device to function, the sky must be clearly visible from the STA. After a cold boot, it may take a few minutes for the GPS to start. The control panel should display at least three to four fixed satellites for the GPS to operate properly.

> 7. Specify the location of the AP by pressing the SET button on the AP location control panel. Click the AP location on the pop-up map page and press OK.

> 8. Move to the desired location and start logging measurement data by turning on CONTINUOUS LOGGING.

> Note

> The measurement values in the screenshot are randomly generated using a GPS simulator.

> 9. Once all the data points are collected, either turn off CONTINUOUS LOGGING or press DISCONNECT. To save the data points, access the menu item File->Save Results from the top menu bar. This will create a timestamped directory with the log files which can be visualized as heatmaps using the WAVE (WiFi Area Visual Evaluator) tool.

> Warning

> Please make sure that the logs are properly saved before you quit the program!