منابع مشابه
Kriged Road-Traffic Maps
A kriging based on residuals is employed for spatial extrapolation of anisotropic directional road–traffic data. The set of data considered in the present paper includes, among others, the actual geographic positions and velocities of approximately 300 test vehicles in downtown Berlin. They are transmitted to a central station within regular time intervals. The main idea of the extrapolation te...
متن کاملKnowledge Asset Road Maps
This paper describes how AIAI has used the ideas and techniques behind Technology Road Maps in order to provide a framework for developing Knowledge Asset Road Maps to support knowledge management initiatives. By carefully relating knowledge management actions upwards to business objectives and strategies, and downwards to specific knowledge assets, a co-ordinated picture of the various parts o...
متن کاملLabel Placement in Road Maps
A road map can be interpreted as a graph embedded in the plane, in which each vertex corresponds to a road junction and each edge to a particular road segment. We consider the cartographic problem to place non-overlapping road labels along the edges so that as many road segments as possible are covered by labels. We show that this is NP -hard in general, but can be solved in polynomial time if ...
متن کاملExtracting Road Vector Data from Raster Maps
Raster maps are an important source of road information. Because of the overlapping map features (e.g., roads and text labels) and the varying image quality, extracting road vector data from raster maps usually requires significant user input to achieve accurate results. In this paper, we present an accurate road vectorization technique that minimizes user input by combining our previous work o...
متن کاملExploring Road Incident Data with Heat Maps
This research seeks to determine whether heat mapping is an effective technique for the visual exploration of road incident data. Four software prototypes, which adopted map, treemap and spatial treemap layouts, were developed using open source software. Whilst the visualization process described by Fry (2007) informed the development effort, the evaluation methodology was based on the Nested P...
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ژورنال
عنوان ژورنال: Academic Emergency Medicine
سال: 2011
ISSN: 1069-6563
DOI: 10.1111/j.1553-2712.2010.00994.x