نتایج جستجو برای: سامانه gis

تعداد نتایج: 41984  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده کشاورزی 1389

مسائل اقتصادی و زیست محیطی در کنار مسائل فنی، تولیدکنندگان محصولات کشاورزی را وادار کرده است روش های جدید را در مدیریت تولید محصولات کشاورزی بکار گیرند. در روش های متداول تولید محصولات کود شیمیایی به طور یکنواخت در سطح مزرعه توزیع می گردد. این در حالی است نیاز خاک در سطح مزرعه یکنواخت نیست. هدف از این تحقیق کوددهی با استفاده از فناوری نرخ متغیر و متناسب با نیاز خاک می باشد. در فن آوری اعمال نها...

Journal: :ISPRS Int. J. Geo-Information 2017
Yongze Song Xiangyu Wang Yi Tan Peng Wu Monty Sutrisna Jack C. P. Cheng Keith Hampson

The integration of building information modelling (BIM) and geographic information system (GIS) in construction management is a new and fast developing trend in recent years, from research to industrial practice. BIM has advantages on rich geometric and semantic information through the building life cycle, while GIS is a broad field covering geovisualization-based decision making and geospatial...

2014
Ali O. Ulusoy Joseph L. Mundy

This paper describes an approach to reconstruct the complete history of a 3-d scene over time from imagery. The proposed approach avoids rebuilding 3-d models of the scene at each time instant. Instead, the approach employs an initial 3-d model which is continuously updated with changes in the environment to form a full 4-d representation. This updating scheme is enabled by a novel algorithm th...

2017
Daniel J. Plebanek Vladimir M. Sloutsky Sophia Deng Andy Leber Layla Unger

One of the law-like regularities of psychological science is that of developmental progression – an increase in sensorimotor, cognitive, and social functioning from childhood to adulthood. Here we report a rare violation of this law – a developmental reversal in attention. In Experiment 1, 4to-5-year-olds (N= 34) and adults (N = 35) performed a change detection task that included externally cue...

آرش ملکیان حسن علی فرجی سبکبار سیروس حسن پور هایده کیانی آلرد,

مهم­ترین و اولین قدم در انجام پروژه طرح پخش سیلاب مکان­یابی مناطق مستعد برای پخش آب و نفوذ دادن آن به داخل سفره­های زیرزمینی است. از این جهت استفاده از سامانه­های اطلاعات مکانی (GIS)، برای تعیین مناطق مستعد پخش سیلاب بدون استفاده سامانه تصمیم­گیری چند معیاره (MCDM) [1]مقدور نمی­باشد. امروزه در کنار سیستم­های اطلاعات جغرافیایی، سیستم­های تصمیم­گیری چندمعیاره به­طور گسترده­ای برای حل مسائل فضایی ...

2005
Kei SAITO Shinji CHIBA Michihiko SHINOZAKI

The purpose of this paper is to develop the GIS educational environment in training program using open-source GIS software. First, we have verified the substitutability of laboratory exercise materials at our university from commercial GIS to open-source GIS software. Next, we grasp the improvement situation of the free spatial data that are opened to the public by the government and present th...

2012
Jérémie Daniel Jean-Philippe Lauffenburger

This paper deals with a Speed Limit Assistant (SLA) performing the fusion of a Geographic Information System (GIS) and a vision system. The present strategy is based on multi-level data fusion using Evidence Theory. In a first step, the GIS reliability is estimated through GIS criteria related to the positioning, the localization and the digital map resolution. Contextual criteria also extracte...

2003
Joseph J. Kerski

Geographic information systems (GIS) technology and methods have transformed decision-making in society by bringing geographic analysis to the desktop computer. Although some educators consider GIS to a promising means for implementing reform, it has been adopted by less than 2% of American high schools. The reasons behind the interest in GIS, its slow implementation, and its effectiveness in t...

Journal: :Trans. GIS 2006
Sarah Elwood

In the mid-1990s, several critical texts raised concerns about the social, political, and epistemological implications of GIS. Subsequent responses to these critiques have fundamentally altered the technological, political, and intellectual practices of GIScience. Participatory GIS, for instance, has intervened in multiple ways to try to ameliorate uneven access to GIS and digital spatial data ...

2013
Jiangfan Feng Nan Xu

The combination of "voice technology" and "Mobile GIS", has greatly improved the intelligent degree of mobile GIS. Recently, significant attention in the field of scientific research is turning to how to realize quick conversion between natural language and GIS commands. However, the current study mostly concentrates on rules of conversion between natural language sentences and GIS commands fro...

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