Automatic searching of control point in NOAA AVHRR image     

Shu Ning  Shi Huaxiang 《地球空间信息科学学报》2013,16(1):26-29

This paper discusses the approaches for automatical searching of control points in the NOAA AVHRR image on the basis of data rearrangement in the form of latitude and longitude grid. The vegetation index transformation and multi-level matching strategies have been proven effective and successful as the experiments show while the control point database is established.  相似文献   

Using Maximum Likelihood (ML) and Maximum A Prior Probability (MAP) in Iterative Self‐Organizing Data (ISODATA)     

Hassan A. Karimi  Jun Peng 《国际地球制图》2013,28(1):29-36

Abstract

With the availability of high‐resolution satellite imagery featuring as high as 1 meter resolution in the panchromatic mode and 3‐meter resolution in the multispectral mode, there is an interest by many new commercial and public service applications such as cellular telephones coverage area design, urban/land cover planning, and real estate marketing to extract features from images automatically. To that end, the demand for unsupervised classification techniques is growing. In this paper, the Maximum Likelihood (ML) and Maximum A prior Probability (MAP) algorithms are used as decision rules to find boundaries of classes computed by the Iterative Self‐Organizing Data (ISOADATA) algorithm. Different satellite images with different resolutions were used to experiment with these algorithms. The results of comparing and analyzing the algorithms revealed that MAP‐ISODATA performed better than ML‐ISODATA even when the same initial matrix was used. It was shown that there was no significant difference between ML‐ISODATA and MAP‐ISODATA in terms of accuracy. It was also realized that better results could be obtained if homogenous initialization strategies were used.  相似文献   

应用NOAA/AVHRR资料监测水稻长势的研究   总被引：6，自引：1，他引：5  

石宇虹  李国春 《应用气象学报》1999,10(2):243-248

该文利用1992～1996年NOAA/AVHRR资料,结合实测的地面农作物生长发育农学参数,系统地分析了沈阳市水稻移栽至收获整个本田期间遥感归一化植被指数（NDVI）的变化规律,进而达到对沈阳市水稻长势遥感动态监测的目的。  相似文献   

地理信息系统在NOAA卫星遥感动态监测中的应用   总被引：10，自引：0，他引：10  

周红妹 《应用气象学报》1999,10(3):354-360

该文阐述了地理信息系统（GIS）在空间分析和信息处理方面的优势,并有效地将地理信息系统与遥感结合起来,利用NOAA气象卫星对上海地区的洪涝灾害、水稻长势和面积进行动态监测,取得了良好的应用效果。  相似文献   

Automatic searching of control point in NOAA AVHRR image     

SHU Ming SHI Huaxiang SHU Ming  Professor  National Laboratory for Information Engineering in Surveying  Mapping  Remote Sensing  WTUSM  Luoyu Road  Wuhan  China 《地球空间信息科学学报》1999,2(1):26-29

This paper discusses the approaches for automatical searching of control points in the NOAA AVHRR image on the basis of data rearrangement in the form of latitude and longitude grid. The vegetation index transformation and multi-level matching strategies have been proven effective and successful as the experiments show while the control point database is established.  相似文献   

利用NOAA/AVHRR资料监测南方林区森林火灾的研究   总被引：4，自引：0，他引：4  

易浩若  何筱萍  纪平  张彦忠 《国土资源遥感》1995,6(1):24-30

本文论述了南方林区森林火灾时间分布集中、发生率高、面积小,并以地表火为主的特征;总结了气象卫星资料的林火信息特征和非林火干扰信息规律;研究了建造林火监测专家系统的理论方法,进而提出了林火宏观实时监测系统的总体设计,并建立了以计算机图像处理为基础的、以林火背景数据库支持的、以专家系统为核心的林火监测系统。并利用南方林火模拟实验和历史林火资料对该监测系统进行了改进。最后讨论了林火监测系统改进方向和研究体会。  相似文献   

The implementation of an ecosystem approach to management within a federal government agency     

Katherine W. McFadden  Cassandra Barnes 《Marine Policy》2009

This study examined how the United States’ National Oceanic and Atmospheric Administration (NOAA) has begun to implement and change its management strategy towards one of an ecosystem approach to management (EAM). In 2005, surveys were conducted with NOAA scientists and resource managers in nine NOAA programs in eight geographic regions across the United States. We quantitatively examined temporal and spatial trends in NOAA's EAM project implementation. Through a qualitative analysis of the data, we identified important lessons learned, best practices, and challenges of NOAA EAM projects. A content analysis identified three of the most frequently provided “success strategies” and include: (1) encouraging collaborations, (2) utilizing multidisciplinary approaches, and (3) identifying common priorities among constituents. We conclude with recommendations for initiatives that NOAA, and others interested in EAM, can undertake to facilitate further ecosystem management opportunities.  相似文献   

卫星热红外亮温异常与深水海域天然气水合物藏区分布——以墨西哥湾地区为例     

马立杰  黄海军  崔迎春  强祖基 《海洋湖沼通报》2009,(4)

以墨西哥湾西北部陆坡区为研究区,利用NOAA/AVHRR热红外影像,通过分析1999年Central Mexico 7.0级地震、1999年Oaxaco 7.5级地震和2003年Colima 7.6级地震3次地震期间与墨西哥湾西北部陆坡区海底天然气水合物藏区对应的海表面上方卫星热红外亮温异常的变化,研究了卫星热红外亮温异常与深水海域天然气水合物藏区分布的关系.研究发现,与墨西哥湾西北部陆坡区海底天然气水合物藏区对应的海表面上方,临震前频繁出现孤立的、带状的、强度较大的卫星热红外亮温异常,该研究结果表明,同次和多次地震临震前,该地区频繁出现孤立、带状、强度较大的卫星热红外亮温异常可能与海底蕴藏着天然气水合物藏有关.  相似文献   

Comparison of some vegetation indices in seasonal information   总被引：1，自引：1，他引：0  

Chengyuan Hao  Shaohong Wu  Chuanyang Xu 《中国地理科学(英文版)》2008,18(3):242-248

With the development of vegetation indices, the reflection capability of vegetation indices to the state of vegetation has been improved in various degrees. Especially, the vegetation index of Terra/MODIS-EVI is believed to have the highest sensitivity to the seasonality of vegetation. This study compares the reflection susceptibility of three vegetation indices （NOAA/AVHRR-NDVI, Terra/MODIS-NDVI and Terra/MODIS-EVI） to the seasonal variations of vegetation in the mid-south of Yunnan Province of China. It has been found that Terra/MODIS-EVI does best in the elimination of external disturbance. Firstly, it obviously improves the linear relationship with vegetation cover degree, especially in the high vegetation coverage area. Secondly, it avoids the emergence of vegetation index saturation. Thirdly, it reduces the environmental influence including both effects of atmosphere and soil. So it is believed that the Terra/MODIS-EVI can offer excellent tool for quantitative research of remote sensing, and has realized to be oriented by data with high quality.  相似文献   

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郭卫英  张家勇  高丽 《大地测量与地球动力学》2008,28(3):36-40

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