| Popis: |
Today location technologies are integrated into many devices enabling location-based services. Movement data recorded with these devices can be uploaded to web sites and shared with others. Movement data can be organized using keywords and semantic tags, e.g. walking and running. Our main goal is to automatically classify movement data as walking, cycling or driving. In contrast to other work we use real world GPS data without time information. Users delete time information to protect their privacy. Over a period of two months we collected movement data from a popular track sharing platform and classified the GPS tracks using Decision Tree, Naive Bayes, Support Vector Machine and Naive Bayes Tree. Our results show that users can expect reasonable results from tag suggestion services detecting moving type even without time information. A second result of our work indicates that angle-based features are insignificant for classification using real world GPS tracks. Distance was the only significant feature in our study. |
