论文部分内容阅读
一、引言为了确定农、林、牧业的合理布局,因地制宜地利用土地,充分发挥土地潜力,就必须对土地资源的数量与质量进行全面系统地调查和评价。近二十多年来,遥感技术的迅速发展,为各种资源调查提供了极为有利的条件。如何应用航空遥感图象来了解各主要地类面积的变化,则是当前和今后大家所热心的问题,这就是我们所说的“动态监测”的面积动态问题。二、技术设计与方法(一)试验区概况试验区为淳化县,该县位于渭北黄土高原的南缘,东径108°18′—108°50′,北纬34°43′—35°03′。总面积9.1万多公顷。该地区有两个时期的全色航片、万分之一地形图及农、林、果等调查区划资料和文
I. INTRODUCTION In order to determine the reasonable layout of agriculture, forestry and animal husbandry and to utilize the land according to the local conditions and give full play to the potential of the land, we must conduct a comprehensive and systematic survey and evaluation on the quantity and quality of the land resources. In the recent two decades, the rapid development of remote sensing technology has provided extremely favorable conditions for various resource surveys. How to apply the remote sensing images to understand the changes of the major types of areas is a current and future enthusiastic question. This is what we call the “dynamic monitoring” of the dynamic area of the area. 2. Technical Design and Methods (I) Overview of the Experimental Area The experimental area is Chunhua County, which is located on the southern margin of the Weibei Loess Plateau with an east diameter of 108 ° 18’-108 ° 50 ’and a latitude of 34 ° 43’-35 ° north 03 ’. The total area of more than 91,000 hectares. The region has two periods of panchromatic aerial photographs, one ten thousandth topographic maps and farming, forest, fruit and other survey data and text