Ground truth locations of cell towers


#1

Hello,

This work uses ground truth values for cell tower locations for Germany, Poland, Russia obtained from openCelliD DB [http://people.cs.uchicago.edu/~ravenben/publications/pdf/crowdrss-www17.pdf].

I have downloaded data for these countries but have only a unique value for changeable field which is 1.
Where to find data that contains GT locations?