Page 141 - Special Topic Session (STS) - Volume 4

STS571 Sarpono et al.
percent in 2015, while for other countries the neighboring countries constitute
about 40 percent of tourism.
Mobile positioning data is used to complement tourism data at cross
border posts in which Immigration Checkpoint is not available and difficult to
conduct Cross-Border Survey. Before releasing the tourism data, BPS
compares international visitor arrival data obtained from cross-border survey,
immigration checkpoint at cross-border area, and mobile positioning data. If
mobile positioning data from Telkomsel (the mobile network operator) is more
than data from cross-border survey and immigration checkpoint, the excess
of mobile positioning data will be added to the number of international visitor
arrival, this is the number of additional international visitor arrivals from
mobile positioning data.
However, the use of MPD in the calculation of visits of foreign tourists is
not without obstacles. MPD has several shortcomings, among them not all
foreign SIM card users are residents abroad. In addition, there is also no
information about the number of SIM cards used per person. MPD also cannot
provide information about the characteristics of SIM card owners such as the
purpose of the visit and expenditure. Other information such as how many
strangers passing by who do not carry a mobile phone or use a local sim card
also cannot be known with the MPD.

Figure 1. Over and under coverage in MPD

The data collection resulted in cross border ratio as correction factor for
MPD data. These values will be used as a basis for calculating the additional
number of foreign tourists visiting in the border areas. The first value is the
average foreign SIM card brought by the foreign SIM card holders. This
number is calculated from the total number of foreign SIM cards divided by

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