Land cover mapping of north and central America - Global Land Cover 2000

被引:142
作者
Latifovic, R
Zhu, ZL
Cihlar, J
Giri, C
Olthof, I
机构
[1] Natl Resources Canada, Applicat Div, Canada Ctr Remote Sensing, Ottawa, ON K1A 0Y7, Canada
[2] US Geol Survey, EROS Data Ctr, Sioux Falls, SD USA
[3] Noetix Res Inc, Ottawa, ON, Canada
基金
美国国家航空航天局;
关键词
remote sensing; landcover; classification; accuracy assessment; VGT;
D O I
10.1016/j.rse.2003.11.002
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The Land Cover Map of North and Central America for the year 2000 (GLC 2000-NCA), prepared by NRCan/CCRS and USGS/EROS Data Centre (EDC)' as a regional component of the Global Land Cover 2000 project, is the subject of this paper. A new mapping approach for transforming satellite observations acquired by the SPOT4/VGTETATION (VGT) sensor into land cover information is outlined. The procedure includes: (1) conversion of daily data into 10-day composite; (2) post-seasonal correction and refinement of apparent surface reflectance in 10-day composite images; and (3) extraction of land cover information from the composite images. The pre-processing and mosaicking techniques developed and used in this study proved to be very effective in removing cloud contamination, BRDF effects, and noise in Short Wave Infra-Red (SWIR). The GLC 2000-NCA land cover map is provided as a regional product with 28 land cover classes based on modified Federal Geographic Data Committee/Vegetation Classification Standard (FGDC NVCS) classification system, and as part of a global product with 22 land cover classes based on Land Cover Classification System (LCCS) of the Food and Agriculture Organisation. The map was compared on both areal and per-pixel bases over North and Central America to the International Geosphere-Biosphere Programme (IGBP) global land cover classification, the University of Maryland global land cover classification (UMd) and the Moderate Resolution Imaging Spectroradiometer (MODIS) Global land cover classification produced by Boston University (BU). There was good agreement (79%) on the spatial distribution and areal extent of forest between GLC 2000-NCA and the other maps, however, GLC 2000-NCA provides additional information on the spatial distribution of forest types.. The GLC 2000-NCA map was produced at the continental level incorporating specific needs of the region. (C) 2003 Elsevier Inc. All rights reserved.
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页码:116 / 127
页数:12
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