遥感信息与地理数据的复合研究——以区域农业气候资源研究为例

The Study of Integrating Geographic Data and Remotely Sensed Data——Take the Regional Agroclimatic Resource Study as an Example

本文从理论上探讨了将地理信息系统提供的地理数据与遥感数据复合的可行性;从方法上探讨了将≥10℃积温、地形高程、年降水量三个影响和反映区域气候资源条件的主要指标,按一定的地面网格系统和数学模式进行量化,并使之与经过优化、压缩处理的陆地卫星TM数据进行信息复合;在应用上,以长白山南坡长白县境内的山区自然环境为例,进行了区域气候资源的研究工作。该研究方法改变了遥感影像的单一信息结构,丰富了图像信息含量,完成了地理数据的数字传输、处理、存储及影像化显示。实现了区域气候资源分类界限指标遥感判读的定量化。为提高遥感应用的地学科学性探索了新方法。

In theoretical, this article discusses the feasibility of integrating the geographic data supplied by geographic information system and remotely sensed data. In methodically, it discusses how the ≥10℃ accumulated temperature, terrain elevation and annual rainfall, which were considered as three key factors to reflect the local climatic resource conditions, can be digitized according to a certain ground grid system, then integrated it with the LANDSAT TM data. In application, it takes the natural environment of Changbai County, which located in southern slope of Changbai Mountains, as working area and makes mountainous climatic resource study. The research results show that the research method changes the single spectrum information structure of LANDSAT remotely sensed data set; it realized the digital transmission and image display of geographic data; enriched the image information. In the climatic study, the quantitative boundary of different classes were realized and the accuracy of classifications were greatly improved.