Please wait a minute...
高级检索
高原气象  2008, Vol. 27 Issue (1): 215-221    
论文     
基于植被生长规律的陕西省植被遥感分类
李登科1, 郭铌2
1. 陕西省农业遥感信息中心, 陕西 西安 710014;
2. 中国气象局 兰州干旱气象研究所, 甘肃 兰州 730020
Classifying Types of Vegetation Remote Sensing Based on Growing Law in Shaanxi Province
LI Deng-ke1, GUO Ni2
1. Shaanxi Remote Sensing Information Center for Agriculture, Xi'an 710014, China;
2. Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China
 全文: PDF(1228 KB)   HTML
摘要:

植被类型的差异除了可表现为光谱差异外, 还可表现为植被生长规律的差异。植被生长以年为周期, 在这个生长周期内不同植被类型有着各自的生繁衰枯的物候节律, 表现出不同的生长规律。归一化植被指数NDVI是植被生长状况的敏感指示器, 一年内的NDVI所构成的NDVI的时间序列曲线是表征植被生长规律的理想方法, 因此利用NDVI时间序列进行植被分类是完全可行的。利用2004年全年的MODIS资料, 选取距离星下点周围1000 km以内完全包含陕西省行政区域的晴空(包括部分晴空)250 m分辨率资料计算NDVI, 采用NDVI多时相最大值合成法(MVC), 生成了一年的月合成NDVI数据集产品, 应用ISODATA算法进行非监督动态聚类。在地理信息系统的支持下, 结合以往的植被类型、土地利用、种植制度区划、电子地图等辅助地理信息数据, 对分类结果进行了解译和验证, 并分析了各类植被类型的NDVI时间序列曲线。表明分类结果能客观地反映植被分布的地域性; 各类NDVI曲线之间差别显著, 有着明显的可分性, 它们如实地刻画了各种植被的生长规律, 并能区分植被生长规律的细微差异。

关键词: MODIS/NDVI生长规律植被类型    
Abstract:

The differences between types of vegetation represent as not only the dissimilarities of their spectrums, but also of their growing laws. Vegetation grows in a cycle of a year. Difference types of vegetation respectively has its developmental rhythm or special growing law in this cycle. NDVI is the indicator of growing status of vegetation. It is a idea method to express growing law of vegetation by NDVI time sequence curve in a year. Therefore, the types of vegetation can be classified using NDVI time sequence. Sixty-nine time's MODIS images included Shaanxi Province with fine weather in 2004 had been collected to calculate NDVI. Unsupervised classification model had been run with monthly composite NDVI data set gained by MCV. Classification result was combined and interpreted under GIS according to former maps of vegetation types, land use, agricultural zone and so on. NDVI time sequence curves of vegetation types had been analyzed. It is proved that the classification result can factually reflect regional distributing of vegetation, the diversities between the curves of classifications were obvious and classifiable, growing law of the types of vegetation can be figured.

Key words: MODIS/NDVI    Growing law    Types of vegetation
收稿日期: 2006-10-31 出版日期: 2008-02-24
:  P463.22  
基金资助:

国家自然科学基金项目(40375011)资助

作者简介: 李登科(1963-),男,陕西人,高级工程师,主要从事卫星遥感应用业务和研究.E-mail:ldk81711@sina.com
服务
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章  
李登科
郭铌

引用本文:

李登科, 郭铌. 基于植被生长规律的陕西省植被遥感分类[J]. 高原气象, 2008, 27(1): 215-221.

LI Deng-ke, GUO Ni. Classifying Types of Vegetation Remote Sensing Based on Growing Law in Shaanxi Province. PLATEAU METEOROLOGY, 2008, 27(1): 215-221.

链接本文:

http://www.gyqx.ac.cn/CN/        http://www.gyqx.ac.cn/CN/Y2008/V27/I1/215

[1] 管晓丹, 郭铌, 黄建平, 葛觐铭, 郑志海. 植被状态指数监测西北干旱的适用性分析[J]. 高原气象, 2008, 27(5): 1046-1053.
[2] 杨嘉, 郭铌, 黄蕾诺, 贾建华. 西北地区MODIS-NDVI指数饱和问题分析[J]. 高原气象, 2008, 27(4): 896-903.
[3] 张杰, 张强, 李栋梁, 王文. 不同植被LAI的MODIS反演及其在青藏高原东部的应用[J]. 高原气象, 2008, 27(4): 904-910.
[4] 除多 . 基于NOAA AVHRR NDVI的西藏拉萨地区植被季节变化 [J]. 高原气象, 2003, 22(s1): 145-151.
[5] 王绍令, 丁永建, 赵林, 小池俊雄. 青藏高原局地因素对近地表层地温的影响[J]. 高原气象, 2001, 21(1): 85-89.
img

QQ群聊

img

官方微信