Harvey J. Miller

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Hägerstrand’s time geography is a powerful conceptual framework for understanding constraints on human activity participation in space and time. However, rigorous, analytical definitions of basic time geography entities and relationships do not exist. This limits abilities to make statements about error and uncertainty in time geographic measurement and(More)
Our lives consist of activities in space and time. The basic activities that structure our lives, such as family, work, shopping, recreation and socializing, occur at a few geographic locations and for limited temporal durations. People have scarce time and resources to distribute among required (e.g. work, home) and desired (e.g. recreational, social)(More)
‘‘ I invoke the first law of geography: everything is related to everything else, but near things are more related than distant things’’ (Tobler 1970). How could a sentence justifying heuristic calculations in a crude urban growth simulation generate an icon now known as Tobler’s First Law (TFL)? Why has this law resonated so strongly in geography? Waldo(More)
Key scientific and application questions concern the relationships between individual-level activities and their effects on broader human phenomena, such as transportation systems and cities. Continuing advances in geographic information science, location-aware technologies, and geosimulation methods offer great potential for observational and simulation(More)
Location-based services assist people in their decision-making during the performance of tasks in space. They do not consider the user’s individual preferences, time constraints, and possible subtasks to be performed. In order to account for these important aspects, a user centered spatio-temporal theory of location-based services is required. We propose(More)
Human lives consist of activities such as working, raising families, socializing, shopping and recreation. These activities require time and space, and are often only available at particular locations for limited durations. People differ with respect to the location and timing of key activities in their lives (e.g., home, work) as well as available time and(More)