نتایج جستجو برای: land cover and land use

تعداد نتایج: 17015045  

2017
Finn Müller-Hansen Manoel F. Cardoso Eloi L. Dalla-Nora Jonathan F. Donges Jobst Heitzig Jürgen Kurths Kirsten Thonicke

Changes in land-use systems in tropical regions, including deforestation, are a key challenge for global sustainability because of their huge impacts on green-house gas emissions, local climate and biodiversity. However, the dynamics of land-use and land-cover change in regions of 5 frontier expansion such as the Brazilian Amazon is not yet well understood because of the complex interplay of ec...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی و اجتماعی 1389

today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...

2007
W. E. Riebsame W. J. Parton K. A. Galvin I. C. Burke

ocal and regional land-use and land-cover change is an important ingredient in the larger problem of global environmental change. Land-use patterns, driven by a variety of social processes, result in land-cover changes that affect biodiversity, water and radiation budgets, trace-gas emissions, and other factors that, cumulatively, alter the global climate and biosphere. Most research on global ...

Journal: :International Journal of Geographical Information Science 2012
Y. H. Ran Xin Li L. Lu Z. Y. Li

Land cover type is a crucial parameter that is required for various land surface models that simulate water and carbon cycles, ecosystem dynamics, and climate change. Many land use/land cover maps used in recent years have been derived from field investigations and remote-sensing observations. However, no land cover map that is derived from a single source (such as satellite observation) proper...

2012
Manibhushan Nilanchal Patel Gadadhar Sahoo

An artificial neural network is a system based on the operation of biological neural networks, in other words, is an emulation of biological neural system. Artificial Neural Networks or simply Neural Networks are powerful general purpose computing tools. They have become popular in the analysis of remotely sensed data, particularly in classification or feature extraction from image data more ac...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2017
Ron Hagensieker Ribana Roscher Johannes Rosentreter Benjamin Jakimow Björn Waske

Remote sensing satellite data offer the unique possibility to map land use land cover transformations by providing spatially explicit information. However, detection of short-term processes and land use patterns of high spatial-temporal variability is a challenging task. We present a novel framework using multi-temporal TerraSAR-X data and machine learning techniques, namely Discriminative Mark...

Journal: :Environmental management 2003
S E Walsh P A Soranno D T Rutledge

The importance of the surrounding landscape to aquatic ecosystems has been well established. Most research linking aquatic ecosystems to landscapes has focused on the one-way effect of land on water. However, to understand fully the complex interactions between aquatic and terrestrial ecosystems, aquatic ecosystems must be seen not only as receptors of human modification of the landscape, but a...

Journal: :international journal of advanced biological and biomedical research 2013
vahed kiyani

for an optimum use of natural resources in the sustainable development trend, there is a need to identify ecological resources in the shortest period of time and minimum possible cost. in this article, we aimed management ecosystem by assessment of plant covers changes at taleghan township in a twenty year period. percentage of landscape and number of patch were among the metrics that were calc...

Journal: :ISPRS Int. J. Geo-Information 2017
Hui Yang Songnian Li Jun Chen Xiaolu Zhang Shishuo Xu

A number of national, regional and global land cover classification systems have been developed to meet specific user requirements for land cover mapping exercises, independent of scale, nomenclature and quality. However, this variety of land-cover classification systems limits the compatibility and comparability of land cover data. Furthermore, the current lack of interoperability between diff...

2014
John W. Coulston Gregory A. Reams David N. Wear Kenneth Brewer

Quantifying the amount of forest and change in the amount of forest are key to ensure that appropriate management practices and policies are in place to maintain the array of ecosystem services provided by forests. There are a range of analytical techniques and data available to estimate these forest parameters, however, not all ‘forest’ is the same and various components of change have been pr...

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