论文部分内容阅读
以卫星(如陆地卫星)遥感为适宜的工具,通过区域定量分析,能给区域地理学的发展以新的活力。以珠江三角洲为例,土地利用与土地覆盖资料可从陆地卫星图像中提取,土壤、地质、气候、人口密度等环境资料则可从其他来源获得。然后把所有这些资料汇集于共同基础——卫星影像的像元之上。将数量合适的像元,结合适当大小的若干个单元,以便于作1∶100万比例尺的资料存储和分类。由计算机用群集法,对这些单元作分类。卫片(指陆地卫星像片,下同)的价值在于它能定期覆盖同一区域,产生逼真的地面环境图像,使区域地理特征的文字描述可减至最低限度。通过定量研究,更易于理解一个地区在发展过程中形成的各种环境特征之间的相互影响。所推荐的这种方法,能导致信息系统的发展。这种信息系统,可为重要的农业地区珠江三角洲的发展提供信息,具有实用价值。
Using satellite (such as land satellite) remote sensing as an appropriate tool, through regional quantitative analysis, can give new vitality to the development of regional geography. Taking Pearl River Delta as an example, land use and land cover data can be extracted from land satellite images. Environmental data such as soil, geology, climate and population density can be obtained from other sources. Then put all this information together on the common ground - satellite imagery above the pixel. A suitable number of cells are combined with a number of cells of appropriate size to facilitate 1: 1 million scale data storage and classification. By the computer cluster method, these units for classification. The value of a patch of satellites (terrestrial satellite imagery, the same below) lies in the fact that it can regularly cover the same area and produce a realistic image of the ground environment, minimizing the textual description of the geographical features of the area. Quantitative research makes it easier to understand the interplay between the various environmental characteristics that a region develops during its development. The proposed method can lead to the development of information systems. This information system can provide information for the development of the Pearl River Delta, an important agricultural area, and has practical value.