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Algorithms of Expert Classification Applied in Quickbird Satellite Images for Land Use Mapping Chilean J. Agric. Res.
Perea,Alberto Jesús; Meroño,José Emilio; Aguilera,María Jesús.
The objective of this paper was the development of a methodology for the classification of digital aerial images, which, with the aid of object-based classification and the Normalized Difference Vegetation Index (NDVI), can quantify agricultural areas, by using algorithms of expert classification, with the aim of improving the final results of thematic classifications. QuickBird satellite images and data of 2532 plots in Hinojosa del Duque, Spain, were used to validate the different classifications, obtaining an overall classification accuracy of 91.9% and an excellent Kappa statistic (87.6%) for the algorithm of expert classification.
Tipo: Journal article Palavras-chave: Expert classification; Vegetation index; Land cover; Object-based classification.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300013
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Assessment of TerraClass and MapBiomas data on legend and map agreement for the Brazilian Amazon biome Acta Amazonica
NEVES,Alana Kasahara; KÖRTING,Thales Sehn; FONSECA,Leila Maria Garcia; ESCADA,Maria Isabel Sobral.
ABSTRACT Reliable environmental monitoring and evaluation require high-quality maps of land use and land cover. For the Amazon biome, the TerraClass and MapBiomas projects apply different methodologies to create these maps. We evaluated the agreement between land cover and land use maps generated by TerraClass and MapBiomas (Collections 2 and 3) for the Brazilian Amazon biome, from 2004 to 2014. Specifically, we: (1) described both project legends based on the LCCS (Land Cover Classification System); (2) analyzed the differences between their classes; and (3) compared the mapping differences among the Brazilian states that are totally or partially covered by the Amazon biome. We compared the classifications with a per-pixel approach and performed an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Land cover; Classification system; Remote sensing; PRODES; Non-forest; Geospatial analysis.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000200170
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Butterfly Species Richness Patterns in Canada: Energy, Heterogeneity, and the Potential Consequences of Climate Change Ecology and Society
Kerr, Jeremy T; University of Oxford; Jeremy.Kerr@CCRS.NRCan.gc.ca.
The distributions of most pollinator species are poorly documented despite their importance in providing ecosystem services. While these and other organisms are threatened by many aspects of the human enterprise, anthropogenic climate change is potentially the most severe threat to pollinator biodiversity. Mounting evidence demonstrates that there have already been biotic responses to the relatively small climate changes that have occurred this century. These include wholesale shifts of relatively well-documented butterfly and bird species in Europe and North America. Although studies of such phenomena are supported by circumstantial evidence, their findings are also consistent with predictions derived from current models of spatial patterns of species...
Tipo: Peer-Reviewed Reports Palavras-chave: Butterflies; Climate change; Habitat heterogeneity; Land cover; Latitudinal gradients; Pollinator; Species richness; Species richness-energy theory.
Ano: 2001
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DECOMPOSITION OF THE REMAINING STRAW DURING SOYBEAN GROWING IN THE MIDWESTERN PARANÁ, BRAZIL 196
Wenneck, Gustavo Soares; Saath, Reni; Araujo, Larissa Leite de; Pereira, Gustavo Lopes; Rezende, Roberto; Wenneck, Guilherme Soares.
Crop biomass plays an important role, especially in tropical and subtropical crops that adopt the no-tillage system, whose decomposition is related to material composition and environmental conditions. The objective of this work was to analyze the decomposition of straw remaining from autumn/winter crops in the development of soybean in succession in the Midwest region of Paraná. The experiment was conducted between 2019 and 2021 in a completely randomized design, with eight treatments (spontaneous, black oat, brachiaria, corn, wheat, oilseed radish, corn + brachiaria, and black oat + oilseed radish) and four replications. After autumn/winter cultivation, biomass samples were dried and placed in nylon bags, returning to the original plot during soybean...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Land cover; Organic matter; No-tillage system; Cobertura de solo; Matéria orgânica; Sistema plantio direto.
Ano: 2021 URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6534
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Deforestation and Shade Coffee in Oaxaca, Mexico: Key Research Findings AgEcon
Blackman, Allen; Albers, Heidi J.; Avalos-Sartorio, Beatriz; Crooks, Lisa.
More than three-quarters of Mexico's coffee is grown on small plots shaded by the existing forest. Because they preserve forest cover, shade coffee farms provide vital ecological services including harboring biodiversity and preventing soil erosion. Unfortunately, tree cover in Mexico's shade coffee areas is increasingly being cleared to make way for subsistence agriculture, a direct result of the unprecedented decline of international coffee prices over the past decade. This paper summarizes the key findings of a three-year study of deforestation in Oaxaca, one of Mexico's prime regions for growing shade coffee. First, we find that deforestation during the 1990s was significant. Second, the loss of tree cover can likely be slowed by promoting...
Tipo: Working or Discussion Paper Palavras-chave: Deforestation; Agroforestry; Shade-grown coffee; Mexico; Land cover; Resource /Energy Economics and Policy; O13; Q15; Q23.
Ano: 2005 URL: http://purl.umn.edu/10799
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Historical, Demographic, and Economic Correlates of Land-Use Change in the Republic of Panama Ecology and Society
Wright, Stuart Joseph; Smithsonian Tropical Research Institute; wrightj@si.edu; Samaniego, Mirna Julieta; Smithsonian Tropical Research Institute; samaniem@si.edu.
Tipo: Peer-Reviewed Reports Palavras-chave: Agricultural income; Agriculture; Cattle; Deforestation; Forest transition; Land cover; Pasture; Plantation; Reforestation; Tropical forest.
Ano: 2008
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Impact of land use on river basin water balance: a case study of the Modder River Basin, South Africa. AgEcon
Woyessa, Y.E.; Pretorius, E.; van Heerden, Pieter S.; Hensley, M.; van Rensburg, L.D..
Tipo: Report Palavras-chave: Water resource management; River basins; Climate; Land cover; Land use; Runoff; Water harvesting; Farmers’ attitudes; Crop production; South Africa; Modder River Basin; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Production Economics; Productivity Analysis.
Ano: 2006 URL: http://purl.umn.edu/91819
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Land Cover in a Managed Forest Ecosystem: Mexican Shade Coffee AgEcon
Blackman, Allen; Albers, Heidi J.; Sartorio, Beatriz Avalos; Crooks, Lisa.
Managed forest ecosystems-agroforestry systems in which crops such as coffee and bananas are planted side-by-side with woody perennials-are being touted as a means of safeguarding forests along with the ecological services they provide. Yet we know little about the determinants of land cover in such systems, information needed to design effective forest conservation policies. This paper presents a first-ever spatial regression analysis of land cover in a managed forest ecosystem-a shade coffee region of coastal Mexico. Using high-resolution land cover data derived from aerial photographs, along with data on the institutional, geophysical, socioeconomic, and agronomic characteristics of the study area, we find that plots in close proximity to urban centers...
Tipo: Working or Discussion Paper Palavras-chave: Deforestation; Managed forest ecosystem; Agroforestry; Shade-grown coffee; Mexico; Spatial econometrics; Land cover; Resource /Energy Economics and Policy; O13; Q15; Q23.
Ano: 2003 URL: http://purl.umn.edu/10493
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Land use and occupation analysis of Permanent Preservation Areas in Lavras County, MG Ciência e Agrotecnologia
Reis,Aliny Aparecida dos; Teixeira,Marcelo Dias; Acerbi Júnior,Fausto Weimar; Mello,José Marcio de; Leite,Lucilia Rezende; Silva,Sérgio Teixeira da.
The Permanent Preservation Areas (PPAs) are considered essential for the maintenance of local biodiversity, so that your protection is regulated by the Brazilian legislation. This work had the objective of delimiting permanent preservation areas according to determinations of the current Brazilian environmental legislation, and identify the occurrence of conflict between the land use and legislation in Lavras county, MG, by combination of technologies of remote sensing and geographic information systems. The PPAs correspond to 42.33% of Lavras county's territory. The conflict between the land use and environmental legislation occurs in 63.48% of PPAs' territory, mainly corresponding to the pasture areas, bare soil and agriculture. The PPAs of tops of hills...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Environmental legislation; Land cover; Geoprocessing.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000300005
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LEVANTAMENTO de informações de uso e cobertura da terra na Amazônia - 2012. Infoteca-e
Informações geradas pelo projeto TerraClass 2012 possibilitaram a identificação das grandes tendências de mudanças de uso da terra na região, podendo subsidiar os governos no desenvolvimento de políticas públicas mais adequadas às diferentes demandas existentes.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Amazônia Legal; Cobertura da terra; Projeto TerraClass.; Reflorestamento; Uso da terra; Desmatamento.; Deforestation; Land cover; Amazonia..
Ano: 2014 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1007600
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Modeling Land-Use Decision Behavior with Bayesian Belief Networks Ecology and Society
Aalders, Inge; Macaulay Institute; j.morrice@macaulay.ac.uk.
The ability to incorporate and manage the different drivers of land-use change in a modeling process is one of the key challenges because they are complex and are both quantitative and qualitative in nature. This paper uses Bayesian belief networks (BBN) to incorporate characteristics of land managers in the modeling process and to enhance our understanding of land-use change based on the limited and disparate sources of information. One of the two models based on spatial data represented land managers in the form of a quantitative variable, the area of individual holdings, whereas the other model included qualitative data from a survey of land managers. Random samples from the spatial data provided evidence of the relationship between the different...
Tipo: Peer-Reviewed Reports Palavras-chave: Bayesian belief networks; Land cover; Land use.
Ano: 2008
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Open Source and Open Content: a Framework for Global Collaboration in Social-Ecological Research Ecology and Society
Schweik, Charles; University of Massachusetts, Amherst; cschweik@pubpol.umass.edu; Evans, Tom; Indiana University; evans@indiana.edu; Grove, J. Morgan; U.S. Forest Service, Northeastern Research Station; mgrove@fs.fed.us.
This paper discusses opportunities for alternative collaborative approaches for social-ecological research in general and, in this context, for modeling land-use/land-cover change. In this field, the rate of progress in academic research is steady but perhaps not as rapid or efficient as might be possible with alternative organizational frameworks. The convergence of four phenomena provides new opportunities for cross-organizational collaboration: (1) collaborative principles related to "open source" (OS) software development, (2) the emerging area of "open content" (OC) licensing, (3) the World Wide Web as a platform for scientific communication, and (4) the traditional concept of peer review. Although private individuals, government organizations, and...
Tipo: Peer-Reviewed Reports Palavras-chave: Land use; Land cover; Modeling; Open content; Free/libre software; Open source software.
Ano: 2005
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Satellite-based ET estimation using Landsat 8 images and SEBAL model Rev. Ciênc. Agron.
Silva,Bruno Bonemberger da; Mercante,Erivelto; Boas,Marcio Antonio Vilas; Wrublack,Suzana Costa; Oldoni,Lucas Volochen.
ABSTRACT Estimation of evapotranspiration is a key factor to achieve sustainable water management in irrigated agriculture because it represents water use of crops. Satellite-based estimations provide advantages compared to direct methods as lysimeters especially when the objective is to calculate evapotranspiration at a regional scale. The present study aimed to estimate the actual evapotranspiration (ET) at a regional scale, using Landsat 8 - OLI/TIRS images and complementary data collected from a weather station. SEBAL model was used in South-West Paraná, region composed of irrigated and dry agricultural areas, native vegetation and urban areas. Five Landsat 8 images, row 223 and path 78, DOY 336/2013, 19/2014, 35/2014, 131/2014 and 195/2014 were used,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water management; Land cover; Energy balance.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200221
Registros recuperados: 13
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