Systems and methods are disclosed for determining locations visited by a mobile device. In an embodiment, a first location point is identified from a plurality of location points associated with the mobile device. The first location point may be combined with one or more of the plurality of location points to construct a time block. A time block may indicate a continuous period of time when the mobile device is in the same location. An aggregate location is calculated for the time block based on the plurality of points in the time block. One or more time blocks may be grouped based on the aggregate location of each time block, and a spatial clustering procedure is applied to transform the aggregate locations of time blocks in the group into one or more locations of interest.