无测积手持型GPS面积测量及其精度评价

On Area Measurement and Precision Appraising for the Pocket GPS

以SP24型手持GPS为例,探讨无测积功能GPS测定面积的方法并进行精度评价。结果表明,利用通用坐标转换程序,结合解析法求算面积的方法是解决无测积功能GPS测量面积的理想方法。在重复观测的条件下,手持GPS测量面积的相对误差可以达到2.0％,基本满足林业生产中测量面积的精度要求。同时,结果还表明,利用全站仪的测量结果作为对照,进行GPS面积测量精度的评价方法,可以作为检验GPS测量面积精度的方法之一,在生产实践中具有实用价值。

Taking SP24 pocket GPS as an example, area measurement and precision appraising for GPS without function of measuring area. The results showed that using universal coordinate transform program and analytic geometry method could resolve the problem of measuring area for GPS without function of measuring area. Under the condition of re-observation, the relative errors of measuring area with the pocket GPS could reach 2.0% , which could meet the precision demand of measuring area in forestry practice. Moreover, appraising of precision for the pocket GPS controlled with the results of the universal instrument was a good method for test of measuring area precision, which is useful in practice.