基于手持GPS洞庭湖区植被景观格局外业调绘研究  

Study on Investigation and Mapping of Vegetation Landscape Distribution in the Field for Dongting Lake with Hand-held GPS

作　　者：魏东升[1] 李星照[1] 王唤良[1] 

机构地区：[1]中南林业科技大学,湖南长沙410004

出　　处：《测绘与空间地理信息》2007年第6期47-50,共4页Geomatics & Spatial Information Technology

基　　金：地矿部项目基金(200314200021-4)资助

摘　　要：本文以1∶50 000的地形图为工作底图,采用手持GPS技术、利用实地调查与分解森林资源分布图相结合的方法,对洞庭湖区植被分布状况进行了外业调绘的研究。建立了外业调绘过程中植被群落斑块最小面积和边界的确定原则及其斑块类型与编码。探讨了手持GPS实现WGS-84坐标系向1954北京坐标系的转化方法,并进行了精度估算,其点位误差≤5.8 m,完全可以满足洞庭湖区植被分布外业调绘的精度要求。运用该方法进行植被分布的外业调绘,可以解决运用传统的定位测量方法在湖区定位难的问题,提高了外业作业效率。On the basis of 1 ： 50 000 topographic map and hand - held GPS technology ,with the method of combining field investigation and decomposing the distribution map of forest resources, the author of this papers researched the methods of investigation and maping of vegetation landscape distribution in the field for Dongting Lake. In the process of field identification, the author established the principles of determining the smallest area and border of Vegetation communities patches and their types and codes, studied the methods by which we can transform WGS - 84 coordinate system to 1954 Beijing coordinate system and estimated their precision. The position errors are less than 5. 8 m,which can meet well the precision requirement of field identification on vegetation distribution for Dongting Lake. Field identification of vegetation distribution, by using 1 ： 50 000 topographic map and hand - held GPS technology, can solve the problem that the methods of traditional positioning measurement are difficult in the lake region and improve efficiency of work in the field.

关 键 词：植被景观 洞庭湖 手持GPS 坐标转化. 

分 类 号：P228.4[天文地球—大地测量学与测量工程]