南方典型山区土地利用变化GPS野外测量方法——以攀枝花仁和区为例

GPS FIELD SURVEYING METHOD TO UPDATE LARGE_SCALED LAND USE MAP IN SOUTHERN MOUNTATINOUS AREA OF RENHE DISTRICT,PANZHIHUA CITY

在GPS空间信息技术综合应用于山区土地资源动态监测示范研究背景下 ,总结山地GPS野外测量方法和经验。山地GPS测量作业的主要问题是如何在保证测量数据质量的前提下提高工作效率、减少工作强度。

Supported by integrated techniques of remote sensing and GIS, and with 'Posterior Dynamic Differential Positioning' method being applied, efforts have been made to address practical issues on GPS field surveying work procedure and methods in China's typical southern mountainous area.As could be understood that the core of above issues is tightly related with efficiency and intensity of field surveying work.Thus,in order to adapt to special mountainous working conditions,modifications had been made upon field surveying method and procedure,including 1)Modify traditional field surveying way by carrying out land_use change spatial analysis.Also,by taking advantage of original land use map,available GPS surveying data of changed land parcel's border could be got.2)More emphasis had been laid on task of how to impove GPS field surveying data's quality under special terrain conditions of moutainous area,even though cases of GPS data_processing failure are still unavoidable.3)GPS data's posterior proceeing task requires eligible field surveying data and records to be gathered,considering that various types of GPS surveying data,including polygon,line,even point,could occur.In comparation with traditional surveying method,GPS technique has been giving great boost to regional land resource's more higher accuracy achieved and more converience got.It also provides new category resource of spatial data to enhance considering that much more intensity and complicacy still exist in moutainous area,we are looking forward to re_evaluating future status of GPS technique when commercial remote sensing data with much higher resolution come into use.