To obtain the score of each hotel for each category, we just divide the number of objects of that category with total number of objects of all categories around the hotel as shown in Figure 3. For example, the score of hotel h1 for “FOOD”, “TRAVEL”, and “EDUCATION” are 4/9, 4/9, and 1/9, respectively. However, the score of “ART”, “NIGHTLIFE”, and “SHOPPING” categories for h1 is zero. This is because there is no object of these three categories in the surrounding areas of hotel h1. In this way, we can evaluate the surrounding environments of each hotel. We do not need to compute such scores in real time. So, such computations do not hamper the response time of our system.