There are several desktop tools to minimize GPS errors (e.g., GPSBabel, OpenJUMP with RoadMatcher Application, Footnote 5 and GRASS GIS Footnote 6). However, the GPS signal is degraded in “urban canyons,” under areas of forest canopy, and also due to other interference factors. The performance of low-cost GPS receivers has been greatly improved due to better GPS hardware and enhanced receivers’ functionality. High-accuracy GPS data is an essential concern for LBS. Prototype system for track log management These tools basically comply with open geospatial standards and have the potential to overcome the proprietary limitations in LBS and provide an interoperable framework to work with other geospatial services. Many other FOSS tools are available through the Internet which can be applied to LBS. GPSBabel Footnote 4 is one of the most popular Free and Open Source Software (FOSS) packages for GPS data conversion and transfer. In order to have GPS data online, Gpsd Footnote 3 works as a service daemon that monitors GPS devices and provides the data to other GPS applications through the Internet. The “Open Device Monitoring and Tracking Protocol,” otherwise known as OpenDMTP, Footnote 2 is a protocol and framework that allows bidirectional data communications between servers and devices such as GPS, as well as temperature and other data collected in remote-monitoring devices. An open source approach to implement Web-based GPS tracking management system, OpenGTS, Footnote 1 provides Web-based authentication, mapping, report services, and other useful functions. FOSS4G for LBSĪ number of “open” initiatives have been developed to support LBS. There is a need to implement a framework, wherein LBS and other geospatial services can interoperate more easily and effectively. Therefore, it is difficult to develop or tailor LBS that could meet a wide variety of application scenarios and users’ needs. ![]() The devices cannot be modified and can be only used for their particular purposes. However, accessing LBS requires the use of customized devices or service-supported cell phones with their own closed proprietary protocols or closed source code. There are many GPS tracking devices and systems available on the market. Integration of GPS with Geographic Information Systems (GIS) is also effective for fleet management, logistics, emergency medical services, rescue, and relief work (Derekenaris et al. The emergence of Global Positioning System (GPS)-enabled cell phones and mobile devices has facilitated mass marketing of location-based services (LBS e.g., navigation services, geo-tagged contents, and tracking of assets and personnel). One of the recent developments in geospatial technology is the ubiquity of location information. The research introduces a system that provides an interoperable framework in which to work with other geospatial services through open geospatial standards. This research shows functionalities that can minimize GPS errors using Dilution of Precision filtering and data quality enhancing techniques using the Douglas-Peucker algorithm and PgRouting. ![]() The system supports real-time data collection for the future ubiquitous environment and also can monitor real-time GPS positions. The main function of the system can be separated into three parts: data collection, data management, and data quality enhancement. In this research, a Web-based prototype system for GPS track log and point of interest (POI) management was developed to archive a collaborative framework in field surveys. High-speed broadband technology has promoted collaborative projects such as OpenStreetMap or other User Generated Contents services. Recent advanced performance of low-cost Global Positioning System (GPS) and GPS-enabled cell phones has contributed a great deal to the development of location-aware services and systems.
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