Locate the position in floor . draw the line first , then install door sheet outside 安装地面定位,画好线后拆门钰出来安装
The methods to obtain the tree information by aerial remote sensing technique and locate the position of diseased trees by portable gps were studied 摘要探讨了通过航空录像技术获取林木健康信息及手持式gps地面定位变色树木的方法。