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View article: Physically consistent map matching
Physically consistent map matching Open
An important data source for traffic analysis is GPS trajectory data. However, due to measurement inaccuracies, such data does not necessarily align well with data describing the road network. Hence, GPS data typically needs to be aligned …
View article: Segment Visibility Counting Queries in Polygons
Segment Visibility Counting Queries in Polygons Open
Let P be a simple polygon with n vertices, and let A be a set of m points or line segments inside P. We develop data structures that can efficiently count the objects from A that are visible to a query point or a query segment. Our main ai…
View article: Segment Visibility Counting Queries in Polygons
Segment Visibility Counting Queries in Polygons Open
Let P be a simple polygon with n vertices, and let A be a set of m points or line segments inside P. We develop data structures that can efficiently count the objects from A that are visible to a query point or a query segment. Our main ai…
View article: Route Reconstruction from Traffic Flow via Representative Trajectories
Route Reconstruction from Traffic Flow via Representative Trajectories Open
Understanding human mobility is an important aspect of traffic analysis and urban planning. Trajectories provide detailed views on specific routes, but typically do not capture all traffic. Loop detectors capture all traffic flow at specif…
View article: Maximum Physically Consistent Trajectories
Maximum Physically Consistent Trajectories Open
Trajectories are usually collected with physical sensors, which are prone to errors and cause outliers in the data. We aim to identify such outliers via the physical properties of the tracked entity, that is, we consider its physical possi…
View article: Coordinated Schematization for Visualizing Mobility Patterns on Networks
Coordinated Schematization for Visualizing Mobility Patterns on Networks Open
GPS trajectories of vehicles moving on a road network are a valuable source of traffic information. However, the sheer volume of available data makes it challenging to identify and visualize salient patterns. Meaningful visual summaries of…
View article: Subdivision Directional Fields
Subdivision Directional Fields Open
We present a novel linear subdivision scheme for face-based tangent directional fields on triangle meshes. Our subdivision scheme is based on a novel coordinate-free representation of directional fields as halfedge-based scalar quantities,…
View article: A Sampling-based Strategy for Distributing Taxis in a Road Network for Occupancy Maximization (GIS Cup)
A Sampling-based Strategy for Distributing Taxis in a Road Network for Occupancy Maximization (GIS Cup) Open
We present a weighted sampling strategy for distributing a system of taxi agents on a road network. We consider a setting, in which each agent operates independently, following a prescribed strategy based on historical data. Furthermore, c…
View article: Maximum Physically Consistent Trajectories
Maximum Physically Consistent Trajectories Open
Trajectories are usually collected with physical sensors, which are prone to errors and cause outliers in the data. We aim to identify such outliers via the physical properties of the tracked entity, that is, we consider its physical possi…
View article: Understanding Movement in Context with Heterogeneous Data
Understanding Movement in Context with Heterogeneous Data Open
Movement data, as captured by myriad sensors, has been growing exponentially. Hence, multidisciplinary approaches for analyzing movement has become feasible. Though, movement pertains to a large variety of domains and applications, the foc…
View article: Subdivision Directional Field Processing
Subdivision Directional Field Processing Open
We present a novel subdivision scheme for face-based tangent directional fields on triangle meshes. Our subdivision scheme is based on a novel coordinate-free representation of directional fields as halfedge-based scalar quantities, bridgi…