The positioning data correlate quite well with conventional
accommodation statistics in Estonia. Ahas et al. (2008) found correlation
values of up to 0.99 in most commonly visited tourist regions
(e.g., Saare County) and around 0.6 in regions with less
tourism infrastructure and a high number of transit tourists. The
collection, storage, and processing of the data obtained complies
with European Union (EU) requirements regarding the protection
of personal data according to EU directives on handling personal
data (European Parliament, 1995) and the protection of privacy in
the electronic communications sector (European Parliament,
2002). Separate approval was acquired from the Estonian Data
Protection Inspectorate