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نتایج جستجو برای gis

تعداد نتایج: 22256  
2007
Christine E. Dunn,

Recent years have witnessed a burgeoning of applications of GIS which grant legitimacy to indigenous geographical knowledge as well as to ‘offi cial’ spatial data. By incorporating various forms of community participation these newer framings of Geographical Information Systems as ‘Participatory GIS’ (PGIS) offer a response to the critiques of GIS which were prevalent in the 1990s. This paper r...

2002
Markus Neteler, Helena Mitásová,

open source gis researchgate open source gis a grass gis approach kluwer international a grass gis approach home springer open source gis a grass gis approach darkip neteler mitasova 19 mar 2004 open source gis: grass book the contribution of gis in flood mapping: two approaches open source gis: a grass gis approachthird open source approach to urban growth simulation researchgate implementing ...

2004
Christopher Gold,

The sea moves: the land usually stays still. It is not surprising that the underlying structure of a land-based GIS is rarely appropriate for marine applications. Add the third spatial dimension and it is clear that an attempt to simulate the sea requires a major overhaul of the appropriate algorithms and data structures. It has seemed obvious to us for some time that spatial data structures ne...

2009
F. X. Luo, G. F. Song, E. Q. Wang, L. Q. Ma,

We present a novel GIS, Real Space GIS, which is a 2D & 3D integration GIS. Real Space GIS is based on Real Space which is 3D geographical space and 2D map space which is based on geographical sphere or ellipsoid comparing to Paper Space GIS which is based on traditional Paper Space based on paper map coordinates. Real Space GIS mainly integrates data structure, data model, data storage, data v...

Journal: :Library Trends 2006
Kim M. Ricker,

The implementation and development of effective mentoring is crucial to the growth and success of Geographic Information Systems (GIS) librarianship and staffi ng. Mentoring is necessary to fi ll the gaps for all staff members, especially students. I propose that mentoring can assuage many of the staffi ng obstacles to successful GIS programs. Effective mentoring will create a healthy and produ...

2003
Jantien Stoter,

Introduction Since early ’90 GIS has become a sophisticated system for maintaining and analysing spatial and semantic information on spatial objects. The need for 3D information is rapidly increasing. 2D GIS analysis have shown its limitations in some situations, e.g. noise prediction models (noise spreads out in three dimensions) (Kluijver and Stoter, 2003), water flood models, air pollution m...

2008
Marco Hugentobler,

2004
Jochen Albrecht,

Most GIS are an epitome of static, which is why to many people the word ‘dynamic GIS’ is an oxymoron. GIS usually is about data and to a much lesser degree about what can be done with the data. As such, GIS can be compared to early 20 century geography – an Aristotelian description of ‘where is what’ and ‘what is where’ (Barnes 1984). Process, and the notion of change, are acknowledged on the s...

2011
Michael F. Goodchild,

INTRODUCTION Geographic information systems (GIS) have evolved over the past four decades to provide a unique lens on the Earth’s surface and near-surface – a lens that is increasingly important in a wide range of tasks associated with geographic information, from simple inventory and map-making to analysis, modeling, and spatial decision support. The power of the lens has grown steadily as its...