A multi-objective multi-node dynamic route planning system for a vehicle is presented in this paper. In this system, a bidirectional heuristic search algorithm is designed to perform path planning between two nodes in a topological map created by OpenStreetMap for urban scenarios. And then an improved multi-objective Ant Colony Optimization (ACO) algorithm considering the timeliness of goal nod...

We present a system for the real-time generation of car navigation instructions with landmarks. Our system relies exclusively on freely available map data from OpenStreetMap, organizes its output to fit into the available time until the next driving maneuver, and reacts in real time to driving errors. We show that female users spend significantly less time looking away from the road when using ...

We propose to use the trustworthiness of features in OpenStreetMap as a proxy function for data quality, where a feature’s trust value is computed solely from its history. The trustworthiness is based on the different contribution patterns that can be found in a feature’s history, such as rollbacks or deletions. We argue that these patterns influence the trustworthiness of a feature and its con...

With the increasing success and commercial integration of Volunteered Geographic Information (VGI), the focus shifts away from coverage to data quality and homogeneity. Within the last years, several studies have been published analyzing the positional accuracy of features, completeness of specific attributes, or the topological consistency of line and polygon features. However, most of these s...

Position awareness in unknown and large indoor spaces represents a great advantage for people, everyday pedestrians have to search for specific places, products and services. Therefore a localization system can greatly improve location aware applications in commercial smartphones. In this work we present Navix, a localization application able to provide the position of the user. The position es...

Over the last years, thanks to Open Data initiative and the Semantic Web, there has been a vast increase on user contributed data. In several cases (e.g. OpenStreetMap, Geonames), the respective data include geospatial information, that is the coordinates and/or the precise geometries of buildings, roads, areas, etc. In such cases, proper schemas are defined to allow users to annotate the entit...

This paper examines OpenStreetMap data quality at different stages of a participatory mapping process in seven slums Africa and Asia. Data were drawn from an OpenStreetMap-based developed as part research project focusing on understanding inequalities healthcare access slum residents the Global South. Descriptive statistics qualitative analysis employed to examine following question: What is sp...