MapWindow GIS
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Main Text Tracking data is obtained by sampling movement, typically using GPS. Unfortunately, this data is not precise due to the measurement error caused by the limited GPS accuracy, and the sampling error caused by the sampling rate, i. e., not knowing where the moving object was in between position samples. A processing step is needed that matches tracking data to the road network. This technique is commonly referred to as map matching. Most map-matching algorithms are tailored towards mapping current positions onto a vector representation of a road network. Onboard systems for vehicle navigation utilize dead reckoning besides continuous positioning to minimize the positioning error and to produce accurate vehicle positions that can be easily matched to a road map. For the purpose of processing tracking data, the entire trajectory, given as a sequence of historic position samples, needs to be mapped. The fundamental difference in these two approaches is the error associated with the data. Whereas the data in the former case is mostly affected by the measurement error, the latter case is mostly concerned with the sampling error.
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MapServ University of Minnesota (UMN) Map Server
MapServer Quantum GIS Web Feature Service (WFS) and Web Map Service
(WMS)
MapWindow GIS DANIEL P. A MES, C HRISTOPHER M ICHAELIS, A LLEN A NSELMO , L AILIN C HEN , H AROLD D UNSFORD Department of Geosciences, Idaho State University, Pocatello, ID, USA Synonyms Open-source GIS; Free GIS; Programmable GIS components; .NET framework; ActiveX components
Cross References Dynamic Travel Time Maps Floating Car Data
Recommended Reading 1. Brakatsoulas, S., Pfoser, D., Sallas, R., Wenk, C.: On mapmatching vehicle tracking data. In: Proc. 31st VLDB conference, pp. 853–864 (2005)
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Definition MapWindow GIS is an open source geographic information system that includes a desktop application and a set of programmable mapping and geoanalytical components. Because it is distributed as open source software under the Mozilla Public License, MapWindow GIS can be reprogrammed to perform different or more specialized tasks and can be extended as needed by end users and developers. MapWindow GIS has been adopted by the United States Environmental Protection Agency as a platform for its BASINS watershed analysis system and is downloaded over 3000 times per month by end users who need a free GIS data viewer and programmers who need tools for commercial and non-commercial software applications. Main Text MapWindow GIS is a desktop open source GIS and set of programmable objects intended to be used in the Microsoft Windows operating system. Because it is developed using the Microsoft .NET Framework, it is optimized for the Windows environment and can be extended by programmers using the Visual Bas
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