نتایج جستجو برای: زیرساخت داده مکانی1 sdi

تعداد نتایج: 216100  

2005
A. Daneshpour Moghaddam M. R Delavar

By analysis of performed spatial data infrastructures (SDIs) in developed countries, it is believed that one of the most important problems which obstacles the implementation of SDI’s objectives, is the lack of enough harmony in different parts. The solution given in management systems for more adaptability is using total quality management (TQM). In this paper, we compare SDI and TQM from adva...

2013
Mohamed Abuarab Ehab Mostafa Mohamed Ibrahim

Subsurface drip irrigation (SDI) can substantially reduce the amount of irrigation water needed for corn production. However, corn yields need to be improved to offset the initial cost of drip installation. Air-injection is at least potentially applicable to the (SDI) system. However, the vertical stream of emitted air moving above the emitter outlet directly toward the surface creates a chimne...

2016
Italo Lopes Oliveira Jugurta Lisboa Filho Carlos Alberto Moura Alexander Gonçalves da Silva

The International Cartographic Association (ICA) has proposed a formal model to describe Spatial Data Infrastructure (SDI) using three of the five viewpoints of the RM-ODP (Reference Model for Open Distributed Processing) framework, which was later adapted by other researchers. However, the adapted ICA model has not been validated for corporate-level SDI. The Companhia Energética de Minas Gerai...

ژورنال: :پژوهش های حفاظت آب و خاک 0
مهرنوش اقتداری دانشجوی دکترای هواشناسی کشاورزی، پردیس کشاورزی، گروه مهندسی آبیاری و آبادانی، دانشگاه تهران جواد بذرافشان دانشیار گروه هواشناسی کشاورزی، پردیس کشاورزی، گروه مهندسی آبیاری و آبادانی-دانشگاه تهران مریم شفیعی دانشجوی دکترای هواشناسی کشاورزی، پردیس کشاورزی، گروه مهندسی آبیاری و آبادانی، دانشگاه تهران سمیه حجابی دانشجوی دکترای هواشناسی کشاورزی، پردیس کشاورزی، گروه مهندسی آبیاری و آبادانی، دانشگاه تهران

سابقه و هدف: خشکسالی یکی از پیچیده ترین بلایای طبیعی در جهان است و زمانی رخ می دهد که آب قابل دسترس یک سامانه برای تامین نیازهای حداقل یکی از بخش های زیستی، اقتصادی و اجتماعی طی یک دوره زمانی قابل ملاحظه کافی نباشد. گرچه به طور کلی تعریفی جهانی از خشکسالی وجود ندارد، می توان خشکسالی را به انواع مختلفی تقسیم بندی نمود: خشکسالی هواشناسی، کشاورزی، هیدرولوژیکی و اقتصادی-اجتماعی. خشکسالی هیدرولوژیکی...

2009
David O. Yawson Frederick A. Armah

The paper presents thoughts on Sustainable Data Infrastructure (SDI) development, and its user requirements bases. It brings Maslow's motivational theory to the fore, and proposes it as a rationalization mechanism for entities (mostly governmental) that aim at realizing SDI. Maslow's theory, though well-known, is somewhat new in geospatial circles; this is where the novelty of the paper resides...

Journal: :IJSDIR 2015
Bujar Nushi Bastiaan van Loenen Joep Crompvoets

To stimulate the Spatial Data Infrastructures (SDI) development effectively and efficiently, it is key to assess the progress and benefits of the SDI. Currently, several SDI assessment methods exist. However, these are still in an infant stage and none of these appear to meet the requirements of practitioners. As a result, SDI decision makers are still without any guidance on the performance of...

Journal: :Annals of GIS 2006
Chaowei Phil Yang Ying Cao John Evans Menas Kafatos Myra Bambacus

The past decades have witnessed the rapid growth of heterogeneous geospatial information systems. An important way to share these valuable assets is a spatial data infrastructure (SDI). Recent developments in Web Services and distributed geospatial information services provide a practical approach, Web Portals, to building a SDI. This article describes research, development, and challenges rela...

2008
K. C. Stone P. J. Bauer W. J. Busscher J. A. Millen

In the southeastern U.S. Coastal Plains, supplemental irrigation is required to reduce the impact of short‐term droughts and yield‐reducing plant water stress that can occur at least biennially. Sprinkler irrigation is commonly used to water agronomic crops in the region. Microirrigation is typically used for high value fruit and vegetable crops. In recent years and at some locations, microirri...

Journal: :Nature 1986

Journal: :IJSDIR 2007
Lukasz Grus Joep Crompvoets Arnold Bregt

When developing Spatial Data Infrastructures (SDI) initiatives it is increasingly important to assess their outcomes in order to justify the resources spent on those infrastructures. Many researchers throughout the world have been struggling with the issue of assessing SDIs. The task is difficult due to complex, dynamic and constantly evolving nature of SDI. As SDI can be treated as a Complex A...

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