摘要
根据测量的田面高程数据和估算的平地土方量,对GPS测量技术的田间应用效果进行评价,利用统计方法对比分析定点GPS与水准仪测量的高程数据,初步探讨车载行进速度对GPS测量精度的影响,分析采用GPS技术替代人工水准仪测量方法的可行性。结果表明,基于定点GPS数据和水准仪测量结果绘制的田面微地形状况具有较好的相似性,两者间具有相同的测量精度。车载行进速度对GPS测量精度的影响是明显的,慢速下的GPS测量精度高于快速下的相应结果,低速且匀速的车辆行驶方式是确保该法测量精度的重要措施。在农田土地平整作业中,利用先进的GPS技术替代传统的人工水准仪测量方法对田面高程进行测量具有较好的可行性。
The application of GPS technology was evaluated by the measured elevation data and estimated earthwork quantity. The statistic analysis was applied for elevation data at the fixed points measured by GPS and level respectively. The influences of the different moving speeds of the mobile GPS on data precision were also discussed. Therefore, the possibility of using GPS technology to replace traditional level for elevation measurement was analyzed. The results indicate that there is good similarity for field microtopography maps measured by GPS and level and the two measuring methods have the same precision. The speed of mobile GPS presents obviously effects on GPS measuring precision. The data under slower moving speed reveals higher precision than that under faster moving speed. For this reason a relative low and stable moving speed under mobile GPS is of importance to ensure the data precision. The advanced GPS technology shows good potential to replace traditional land level for elevation measurement in agricultural land levelling project.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2005年第1期66-70,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
"十五"国家重大科技专项课题"精细地面灌溉技术研究"(2002AA2Z4041)
