نتایج جستجو برای: cover change

تعداد نتایج: 689153  

2014
Mukesh Singh Boori Vít Voženílek

Olomouc is a unique and complex landmark with widespread forestation and land use. This research work was conducted to assess important and complex land use change trajectories in Olomouc region. Multi-temporal satellite data from 1991, 2001 and 2013 were used to extract land use/cover types by object oriented classification method. To achieve the objectives, three different aspects were used: ...

2000
S. H. BOLES

Land cover change may be overestimated due to positional error in multi-temporal images. To assess the potential magnitude of this bias, we introduced random positional error to identical classiŽ ed images and then subtracted them. False land cover change ranged from less than 5% for a 5-class AVHRR classiŽ cation, to more than 33% for a 20-class Landsat TM classiŽ cation. The potential for fal...

2014
D. S. Ward N. M. Mahowald S. Kloster

Pressure on land resources is expected to increase as global population continues to climb and the world becomes more affluent, swelling the demand for food. Changing climate may exert additional pressures on natural lands as present-day productive regions may shift, or soil quality may degrade, and the recent rise in demand for biofuels increases competition with edible crops for arable land. ...

2003
Matt D. Dunbar

As geographers continue to place more emphasis on the temporal aspect of spatial patterns, there is a need for innovative display techniques to supplement static maps. Visualization software and methods have been developed to recreate natural landscapes, but little has been done to investigate the potential for illustrating land cover change using temporal data acquired from the real world. In ...

2010
Shyam Boriah Varun Mithal Ashish Garg Vipin Kumar Michael Steinbach Christopher Potter Steven A. Klooster

Ecosystem-related observations from remote sensors on satellites offer huge potential for understanding the location and extent of global land cover change. This paper presents a comparative study of three time series based algorithms for detecting changes in land cover. The techniques are evaluated quantitatively using forest fire ground truth from the state of California for 2000–2009. On rel...

2010
Jesus Aguirre Gutiérrez Arie Seijmonsbergen Joost Duivenvoorden

Inventories of past and present land cover changes form the basis for future conservation strategies and landscape management. In this study Landsat images of a mountainous area in Mexico are used in an objectbased and pixel-based image classification. The land cover categories with the highest individual classification accuracies determined with these two methods are extracted and merged into ...

Journal: :Environmental science & technology 2013
Brian Stone Jason Vargo Peng Liu Yongtao Hu Armistead Russell

This study explores the potential effectiveness of metropolitan land cover change as a climate change adaptation strategy for managing rising temperatures in a large and rapidly warming metropolitan region of the United States. Through the integration of a mesoscale meteorological model with estimated land cover data for the Atlanta, Georgia region in 2010, this study quantifies the influence o...

Journal: :Ambio 2007
Timothy J Killeen Veronica Calderon Liliana Soria Belem Quezada Marc K Steininger Grady Harper Luis A Solórzano Compton J Tucker

Land-cover change in eastern lowland Bolivia was documented using Landsat images from five epochs for all landscapes situated below the montane tree line at approximately 3000 m, including humid forest, inundated forest, seasonally dry forest, and cloud forest, as well as scrublands and grasslands. Deforestation in eastern Bolivia in 2004 covered 45,411 km2, representing approximately 9% of the...

2014
Juan José Miranda Leonardo Corral Allen Blackman Gregory Asner

Protected areas are a cornerstone of forest conservation in developing countries. Yet we know little about their effects on forest cover change or the socioeconomic status of local communities, and even less about the relationship between these effects. This paper assesses whether “win-win” scenarios are possible—that is, whether protected areas can both stem forest cover change and alleviate p...

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