نتایج جستجو برای: cover change

تعداد نتایج: 689153  

2010
Paulo M. Barbosa Mário R. Caetano

We present a methodology to detect terrain mobilization in the years following a fire using multitemporal Landsat TM imagery. Furthermore, we show the spectral evolution of the land cover since fire occurrence, and analyze the feasibility of detecting the type of land cover a number of years after fire occurrence. The methodology developed here is a spectral change identification technique base...

Journal: :ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2019

Journal: :journal of rangeland science 0
khosrw shahbazi forests and rangelands research institute of iran ali salajagheh 2faculty of natural resources, tehran university, iran mohammad jafari faculty of natural resources, tehran university, iran hassan ahmadi faculty of natural resources, tehran university, iran aliakbar nazarisamani faculty of natural resources, tehran university, iran mohammad khosrowshahi 3forests and rangelands research institute of iran

negative impacts of gully erosion in marly areas are severe due to improper landuse practices such as irrigation, tillage, overgrazing and degradation of vegetation cover. the objective of this research was to evaluate gully thresholds related to plant vegetation cover and landuse change in the agriculture (ag), fair rangeland (fr) and weak rangeland (wr) areas of ghaasr-e-shirin, kermanshah, i...

براتی قهفرخی, سوسن, خواجه الدین, سید جمال الدین, رایگانی, بهزاد, سلطانی کوپایی, سعید,

To investigate land use changes, Qale Shahrokh basin (15098.1 ha area) was selected. Satellite images of Landsat sensors (MSS, TM and ETM+) were used. After improvement and different enhancement analysis of images such as FCC, PCA, the study area was checked using GPS and topographic maps (1:50000) and other information. Land use units were determined using classified random sampling method. Ma...

Journal: :Remote Sensing 2018
Dengqiu Li Dengsheng Lu Ming Wu Xuexin Shao Jinhong Wei

Land cover changes significantly influence vegetation greenness in different regions. Dense Landsat time series stacks provide unique opportunity to analyze land cover change and vegetation greenness trends at finer spatial scale. In the past three decades, large reclamation activities have greatly changed land cover and vegetation growth of coastal areas. However, rarely has research investiga...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2015
Pawel Netzel Tomasz F. Stepinski

We present a method for assessing land cover change on continental scale and with high spatial resolution. This is a post-classification method, but instead of tracking transitions of land cover classes on cell-by-cell basis the method measures the change at a tile level by quantifying a difference between local patterns of land cover at two different time steps. Pattern-based change assessment...

2000
D. G. Brown B. C. Pijanowski J. D. Duh

This paper presents an approach to modeling land-cover change as a function of land-use change. We argue that, in order to model the link between socio-economic change and changes in forest cover in a region that is experiencing residential and recreational development and agricultural abandonment, land-use and landcover change need to be represented as separate processes. Forest-cover change i...

2006
Markus Schwarz Lars T. Waser Niklaus E. Zimmermann

Knowledge about the land cover of large areas is important for monitoring and modeling of ecological and environmental processes and for land cover change detection. Considerable efforts have recently resulted in the development of global continuous fields for different land cover types at large spatial scales based on NOAA-AVHRR, SPOT-VEGETATION, and TERRA-MODIS data. Researchers have applied ...

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 ...

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