摘要
应用3S技术,以1992、1998和2002年覆盖广州中心区的美国Landsat卫星影像为信息源,用监督分类辅以目视判读法,将广州市中心区的绿地分为5种类型,总精度在90%以上.通过景观格局特征的分析,获取了1992—2002年近10年间广州市中心区绿地景观格局的变化情况:总绿地面积减少,不同类型间发生了复杂变化,以农田绿地和附属地转为非绿地居多.农田绿地不断减少,公共绿地较缺乏.老城区应尽可能创新绿化方式,以增加景观多样性.不同绿地类型面积越来越均匀,绿地景观斑块较规则,多趋于团聚分布.
Analysis on greenland landscape in the Central Area of Guangzhou was conducted.Landsat TM images shot in 1992,1998 and 2002 were used as information sources,with the support of GPS and GIS,classified greenland maps was made by ERDAS software with a total accuracy of more than 90%.The landscape pattern characteristics were analyzed by FRAGSTAS software.The result showed that in the period 1992—2002,the total area of greenland in inner Guangzhou decreased and land use pattern changed complicately,mainly from farmland and affiliated land to non-green land.Farmland decreased continually,making public greenland more and more insufficient.The old districts should make changes in greening mode to increase the landscape diversity.Area of different types of greenland were getting similar,greenland distribution tended to be aggregated and the greenland patches became uniformed.Therefore multiple measures should be employed to improve the dimension of greenland.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2007年第4期73-76,共4页
Journal of South China Agricultural University
关键词
3S技术
绿地
景观格局
动态分析
3S technology
greenland
landscape pattern
dynamic analysis
