نتایج جستجو برای: geographic information systems gis

تعداد نتایج: 2172722  

2012
Bangbo Hu

This paper discusses applications of a revolutionary information technology, Geographic Information Systems (GIS), in the field of the history of cartography by examples, including assessing accuracy of early maps, establishing a database of places and historical administrative units in history, integrating early maps in GIS or digital images, and analyzing social, political, and economic infor...

2012
Wang Qingshan

Nowadays, there are many attempts to establish object-oriented GIS in some software However, they are not accordant to object-oriented concept whole and systematically in the whole course from the process of cognizing and abstracting geographical space to the process of defining and describing GIS data model then to the process of analyzing and designing GIS. Especially, the research on common ...

2005
C. M. Gold

The concept of embedding a data structure within a space of the same or higher dimension allows us to see the common features between various approaches to multidimensional GIS. Examination of the requirements of those data structures indicates the need for local maintenance, based on clear geometric conditions. This in turn shows how the structures may be made dynamic and kinetic, leading to p...

2003
I. K. TSANIS S. NAOUM M. FULLARTON

A 3D hydrodynamic/pollutant transport model was used to simulate the currents and pollutant transport in coastal areas. The bathymetric and shoreline data was provided to the model via a GIS module that operates in the ArcView GIS environment. The module is efficient and capable of generating bathymetric rectangular grids and shorelines of different resolution for open and closed boundary scena...

2017
Amin Mobasheri Jonas Deister Holger Dieterich

Crowdsourcing (geo-) information and participatory GIS are among the current hot topics in research and industry. Various projects are implementing participatory sensing concepts within their workflow in order to benefit from the power of volunteers, and improve their product quality and efficiency. Wheelmap is a crowdsourcing platform where volunteers contribute information about wheelchair-ac...

2011
Suxia Liu Xuan Zhu

Geographic information systems (GIS) are computer-based tools for geographic data analysis and spatial visualization. They have become one of the information and communications technologies for education at all levels. This article reviews the current status of GIS in schools, analyzes the requirements of a GIS-based learning environment from constructivist perspectives, and discusses the major...

2015
Muhammad Ahsan Mahboob Iqra Atif Javed Iqbal

Over the past 30 years, Land development and consumption have been out of control and expanding out of order, especially to marginal areas of some metropolises in Pakistan. In this research, the dynamic change of urban sprawl and its spatial and temporal characteristics was analyzed for Karachi division, Pakistan. To achieve the goal different image processing techniques were applied i.e., (i) ...

2004
Humphrey Southall

Possibly the single most important commitment of the Great Britain Historical GIS project under its funding from the New Opportunities Fund is the construction of a systematic historical gazetteer covering the administrative units of Great Britain over the last two centuries. This is important both as a reference resource in its own right and to tie together our diverse but always place-specifi...

2004
Z. Duran G. Toz

With the recent developments in web-based GIS applications, the process of accessing, sharing, disseminating and analyzing data has changed. Web-based GIS uses the Internet to access and transmit data and the analysis tools to enhance the visualization and integration of spatial data. Multimedia GIS also allows the users to access a wide range of multimedia data. Integration of webbased GIS and...

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