基于多时相遥感影像的东北三省作物分布信息提取

CORC > 中国农业科学院 > 农业环境与可持续发展研究所 > 旱作节水研究室

	基于多时相遥感影像的东北三省作物分布信息提取
	郝卫平 1; 梅旭荣 1; 蔡学良 2; 杜建涛 1; 刘勤 1
刊名	农业工程学报
	2011
卷号	27 期号:1 页码:201-207,393
关键词	遥感 MODIS NDVI 光谱耦合技术亚像素估算东北三省
ISSN号	1002-6819
其他题名	Crop planting extraction based on multi-temporal remote sensing data in Northeast China
英文摘要	该文选用覆盖东北三省2007年主要作物发育期内14个时相MODIS NDVI 250m16d影像,2005年Landsat ETM+30m影像和大量地面调查数据,借助ISODATA非监督分类算法,作物植被系数变化曲线光谱耦合技术和Google Earth工具,提取了主要作物分布的空间信息.基于Landsat ETM+30m影像采用亚像素估算方法对耕地面积系数进行了计算,分别估算了东北三省的耕地,水稻,玉米和大豆的面积,并用各个县级地图做掩模提取了耕地,水稻,玉米和大豆的面积,与同期的统计数据组成4组配对样本进行对比验证.结果表明,4组数据经配对样本的T检验都呈显著性差异,耕地相关系数最高为0.92,依次为玉米,水稻和大豆,都在0.68以上,与统计数据吻合较好,而分析结果位置精度为85.7%,提取结果能较好的反映东北三省主要农作物的空间分布状况,可为其他区域尺度主要作物空间分布信息的提取提供借鉴; Crop area and its spatial distribution are generally considered to be essential data inputs for crop yield estimation, assessment of water productivity and adjustment of cropping structure to support science and policy applications focused on understanding the role and response of the agricultural sector to environmental change issues. The objective of this research was to evaluate the applicability of time-series MODIS 250m normalized difference vegetation index (NDVI) data for large-area crop mapping over Northeast China. Spatial pattern of crop planting was obtained based on 16-day time-series MODIS 250m NDVI data from 2007 to 2008, Landsat enhanced thematic mapper plus (ETM+) images, and ground truth data using Optimal Iteration Unsupervised Classification, spectral matching technique (SMT) and Google Earth. Sub-pixel area fraction estimate was applied to estimate cropland area, rice area, spring maize area and soybean area. We found that the position precision was 85.7%, their correlation coefficient compared with statistic was 0.916,0.685,0.746 and 0.681 respectively, and that there was significant difference between these groups by using paired samples test. Results indicated that the method can accurately reflect various crop distributions in Northeast China and be applied for large-area crops classification and crop planting extraction
学科主题	农作物
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/17201]
专题	农业环境与可持续发展研究所_旱作节水研究室
作者单位	1.中国农业科学院农业环境与可持续发展研究所, 农业部旱作节水农业重点开放实验室, 北京, 100081 2.国际水资源管理研究所驻南非办公室, 南非, 比勒陀利亚, 0184
推荐引用方式 GB/T 7714	郝卫平,梅旭荣,蔡学良,等. 基于多时相遥感影像的东北三省作物分布信息提取[J]. 农业工程学报,2011,27(1):201-207,393.
APA	郝卫平,梅旭荣,蔡学良,杜建涛,&刘勤.(2011).基于多时相遥感影像的东北三省作物分布信息提取.农业工程学报,27(1),201-207,393.
MLA	郝卫平,et al."基于多时相遥感影像的东北三省作物分布信息提取".农业工程学报 27.1(2011):201-207,393.