DOI: 10.1016/j.jag.2015.05.011
Scopus记录号: 2-s2.0-84943626103
论文题名: Detecting subpixel deciduous components to complement traditional land cover classifications in Southwest Finland
作者: Pitkänen T ; P ; , Skånes H ; , Käyhkö N
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2015
卷: 42 起始页码: 97
结束页码: 105
语种: 英语
英文关键词: Ecotones
; k-NN modelling
; Key habitat mapping
; Landscape heterogeneity
; Remote sensing
; Subpixel fractions
Scopus关键词: ecotone
; land cover
; landscape structure
; mapping
; nearest neighbor analysis
; numerical model
; pixel
; remote sensing
; Finland
英文摘要: To ensure successful conservation of ecological and cultural landscape values, detailed and up-to-date spatial information of existing habitat patterns is essential. However, traditional satellite-based and raster classifications rely on pixels that are assigned to a single category and often generalized. For many fragmented key habitats, such a strategy is too coarse and complementary data is needed. In this paper, we aim at detecting pixel-wise fractional coverage of broadleaved woodland and grassland components in a hemiboreal landscape. This approach targets ecologically relevant deciduous fractions and complements traditional crisp land cover classifications. We modeled fractional components using a k-NN approach, which was based on multispectral satellite data, assisted by a digital elevation model and a contemporary map database. The modeled components were then analyzed based on landscape structure indicators, and evaluated in conjunction with CORINE classification. The results indicate that both broadleaved forest and grassland components are widely distributed in the study area, principally organized as transition zones and small patches. Landscape structure indicators show a substantial variation based on the fractional threshold, pinpointing their dependency on the classification scheme and grain. The modeled components, on the other hand, suggest high internal variation for most CORINE classes, indicating their heterogeneous appearance and showing that the presence of deciduous components in the landscape are not properly captured in a coarse land cover classification. To gain a realistic perception of the landscape, and use this information for the needs of spatial planning, both fractional results and existing land cover classifications are needed. This is because they mutually contribute to an improved understanding of habitat patterns and structures, and should be used to complement each other. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79575
Appears in Collections: 气候变化事实与影响
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作者单位: Geography Section, Department of Geography and Geology, University of Turku, 20014, Finland; Department of Physical Geography, Stockholm University, Stockholm, Sweden
Recommended Citation:
Pitkänen T,P,, Skånes H,et al. Detecting subpixel deciduous components to complement traditional land cover classifications in Southwest Finland[J]. International Journal of Applied Earth Observation and Geoinformation,2015-01-01,42