Understanding the interests of tourists is a key skill for attraction managers to prepare plans and make strategic decisions in tourism marketing. The rapid growth and spread of social media websites provide an information-rich channel from which tourism researchers and managers can collect a large amount of text-based reviews or comments and photos relating to the past travel experiences of users. The travel photos with geographic information are especially helpful in identifying the geographical location of the destinations. By analyzing these big data in various formats can help to understand the interests of tourists at destinations. In this paper, a framework is proposed to identify the interests of tourists by integrating information carried by the geotagged photos shared on social media websites. Such an approach is expected to provide sustainable tracking on popular places of interest (POIs) updated by tourists and pick the best representative photos taken by them. The performance of this model is evaluated by conducting a case study using the geotagged photos taken in Hong Kong. A case study proved this proposed framework could make a thriving tourism industry more efficient. INDEX TERMS representative photo, geotagged photo, tourist interest, tourist activity.

The travel notes contain a wealth of tourists' behavior information, which provides a new way to study tourists' preferences. How to mine the text of online travel notes accurately and efficiently has become the key to research tourists' preferences. In this paper, the theory and technology of text mining were introduced into the research of tourists' preference through a large number of online travel notes accumulated on the Internet. The main research work of this paper was as follows: (1) The tourists' preference model was constructed by complex network method; (2) The travel notes data of Sanya tourists as an example was crawled and analyzed. In this paper, the theory of network travel data and text mining is introduced into the study of tourists' preferences, which not only improves the data quality of traditional preference research field, but also provides a new method for mastering tourists' preferences more accurately.