东北“辽金古城”遗址遥感识别技术研究

A Study of Remote Sensing Identification Technology of"Liao-Jin Ancient City"Site in Northeast China

为全面探测与反映东北“辽金古城”遗址空间规律与结构信息,文章在充分收集与整合“辽金古城”遗址资料的基础上,深入分析其主要遥感特征和量化方法,提出了基于遗迹遥感影像特征的“辽金古城”遥感信息提取技术及古城遥感图像分析方法。研究结果表明:利用遥感技术可进一步获取辽金古城遗址形状、类型、规模、结构、保护状态等特征信息,较客观地补充反映古城面貌现状;开展古城信息提取时要选择多时相的高分遥感影像,分辨率最好为亚米级或更高,而后可基于形态、结构、植被覆盖等解译标志确定古城位置、类型等信息;采用遥感技术可以提取古城内外边界、古城墙残留形态、古城中心线、古城门、现代挖掘点、城墙类型、古城遗址植被发育情况等数据,通过对它们的综合分析,能够较全面地反映古城遗址的现存结构和保护状态。

In order to comprehensively detect and reflect the spatial law and structural information of the"Liao-Jin Ancient City"site in Northeast China,on the basis of fully collecting and integrating the"Liao-Jin Ancient City"site data,this paper deeply analyzes its main remote sensing features and quantitative methods.This paper puts forward the remote sensing information extraction technology and remote sensing image analysis method of"Liao-Jin Ancient City"based on the characteristics of relic remote sensing images.The results show that the characteristic information such as shape,type,scale,structure and protection state of Liao-Jin Ancient City site can be further obtained using remote sensing technology,which can objectively reflect the present situation of the ancient city;when extracting the information of the ancient city,we should select the multi-temporal high-resolution remote sensing image with a resolution of sub-meter or higher,and then determine the location and type of the ancient city based on the interpretation marks such as shape,structure,vegetation cover and so on;and the remote sensing technology can be used to extract the data such as the inner and outer boundary of the ancient city,the residual form of the ancient city wall,the center line of the ancient city,the ancient city gate,the modern excavation site,the type of the city wall,the vegetation development of the ancient city site and so on.Through the comprehensive analysis of them,the existing structure and protection status of the ancient city site can be reflected in a more comprehensive way.