نتایج جستجو برای: geographical data systems
تعداد نتایج: 3357917 فیلتر نتایج به سال:
Integrating geographical and multidimensional processing has been proposed in several researches in the database literature. One of the most important issues of this process is data querying. However, most of the current approaches do not take into account the use of a query language to make the simultaneous specification of multidimensional and spatial operators available. In this paper, we pr...
Advanced Traveler [r~format~on Systems (ATIS) under the intelligent Vehicle Highway Systems (IVHS) context require efficient information retrieval and updating in a dynamic environment and at different geographical scales. Some problems in ATIS can be solved based on the functionalities provided by GIS systems. However, extra requirements such as realtime response are not readily met in existin...
The paper starts by sketching the key modes of spatial data analysis (point pattern, continuous surface, areal/lattice), and how they fit into legacy GIS data models. Based on development work with the GRASS release 5 team (GRASS 5 is GPL), status is reported for using R in the analysis of sites (point) data and for raster data, as well as using R as an intermediate analytical environment for i...
A new computational representation for dealing with water flow in GIS applications is proposed. Different computer structures have been studied proposed and implemented and have gained a place in most of the commercial systems. Each particular local water flow data structure needs its own set of operators in order to provide support for Distributed Hydrologic Modeling. On this paper a new data ...
This paper introduces the Telecommunication Outside Plant Markup Language (TOPML), an OpenGis GML (Geographic Markup Language) application schema designed to describe telecommunication outside plant data in which geographical information is an important issue. TOPML uses the standard OpenGis GML schema to include geographic properties to georeferenced telecom network elements. The use of TOPML ...
Remote sensing images contain huge amount of geographical information and reflect the complexity of geographical features and spatial structures. Fractal geometry provides a means of describing and analyzing the complexity of different geographical features in remotely sensed images. It also provides a more powerful tool to compress the remote sensing data than traditional methods. In this stud...
Smart Systems provide novel enabling functionalities and as such are currently a driving force behind product innovation. Smart Systems are, therefore, crucial for the competitiveness of companies and entire industry sectors. Geo-tagging and smart spaces are two promising directions in modern mobile market. Geo-tagging allows to markup any kind of data by geographical coordinates and time. This...
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