The following abbreviations are frequently used in this guide.
|VGI||Volunteered Geographic Information|
|LBSM/LBSN||Location Based Social Media/Network|
|HLL||HyperLogLog, an algorithm for cardinality estimation, see Flajolet et al. 2007|
Flajolet, P., Fusy, E., Gandouet, O., & Meunier, F. (2007). HyperLogLog: the analysis of a near-optimal cardinality estimation algorithm. Conference on Analysis of Algorithms, AofA 07. Nancy, France.