The data was collected by a tester holding a Xiaomi 13 smartphone while walking and collecting data in an underground parking lot covering a 16x70m area. The data includes 5G radio features and geomagnetic field information.

Collection Time: From 09:58 AM to 10:34 AM on July 13, 2024.

Total Samples: 12,800

Training Set (including validation set): 10,240

Test Set: 2,560