利用omap自动计算GPS三参数在土地质量地球化学调查中的应用

Application of Omap in Automatica Calculation of GPS Three Parameters in Geochemical Survey of Land Quality

摘要:

土地质量地球化学调查评价的调查精度较高，GPS主要应用于地球化学测网布设、土壤采样点的定位及其他生态地球化学样品的采集定位。野外工作前必须通过大地测量三角点实测数据进行GPS手持机三参数校正，在GPS中置数，校正参数满足精度要求之后方可进入野外采样阶段,因此，正确的参数设置是使用GPS的关键。利用omap结合1∶5万地形图实现了室内快速自动化校正三参数，精度高，误差小于3m。

Abstract:

The precision of geochemical survey and assessment of land quality is high. GPS technology is mainly used in geochemical surveying network, soil sample point positioning and other ecological geochemical samples collection and positioning. Before the field work, three parameters correction of GPS handset must be carried out through actual measurement datas of triangulation points in geodetic survey, then set datas in GPS. After correction parameters meet the precision requirement, field sampling stage can begin. Therefore, right parameter setting is the key to use GPS. By using omap, combining with topography with the scale of 1∶50000, rapid automatic three-parameter correction indoor can be realized with high precision, and the error is less than 3m.