摘要
利用手持GPS对不同大小的林地面积进行了测量，并分析了其误差规律，给出了单次测量误差的纠正方法。结果表明：林地形状对测量结果无显著差异；对于面积大于1hm^2的林地，可以直接用手持GPS单次测量结果作为林地的面积值；面积在0．3—1．0hm^2的林地，可以将手持GPS单次测量结果代入误差模型中，以计算出的理论值作为林地的面积值；对于面积小于0．3hm^2的林地，则不可以用手持GPS进行林地面积测量，须使用罗盘仪进行林地面积的测定，林地面积小，使用罗盘仪测量并不比GPS的效率低。
The error rule of measuring forestlands of different sizes by handheld GPS was systematically analyzed, and a correction method for single measurement error was given. Results showed that the measurement results of forestlands of different sizes had no significant difference. For the forestland area more than 1.0 hm^2 , the single measurement value by the handheld GPS can be directly used as forestland area. For the forestland area between 0.3 and 1.0 hm^2 , the theoretical value calculated by putting the GPS single measurement value into the error model can be used es forestland area. For the forestland area less than 0.3 hm^2 , the compass should be used to measure forestland area instead of the handheld GPS, and the measurement efficiency of the compass is not lower than that of the handheld GPS due to the small area.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2011年第1期69-71,共3页
Journal of Northeast Forestry University
基金
国家科技攻关计划重大专项专题(2004BA516A12)
关键词
手持GPS
林地面积测量
形状误差
单次测量误差纠正
实践应用
Handheld GPS
Forestland area measurement
Shape error
Single measurement error correction
Practical application
