| 摘要: |
| 针对现有农田土地平整中地形测量精度低、作业效率不高等问题, 提出农田地形快速测量方法。该方法基于RTK-GNSS定位技术动态获取农田边界和内部离散点三维数据, 利用三角形线性插值法建立数字高程模型并生成地形图, 采用校正后的航迹法计算农田面积, 并利用最小二乘法拟合农田坡面方程计算农田坡度和平整度等地势信息。在此基础上开发设计集成采集终端和数据处理软件, 并与美国FieldLevel Ⅱ系统进行农田地形测量对比试验。试验结果表明, 本系统具有较高定位精度、稳定性和作业效率;与FieldLevel Ⅱ系统测量数据相比, 本系统综合相对平均误差率为8.19%, 能够满足农田土地精细平整地形快速测量的要求。 |
| 关键词: 地形测量 RTK-GNSS 联合定位 集成终端 处理软件 |
| DOI：10.11841/j.issn.1007-4333.2014.06.26 |
| 投稿时间：2014-02-11 |
| 基金项目:国家"863"计划项目(2011AA100505) |
|
| Rapid survey technology of farmland terrain based on RTK-GNSS |
|
LI Hong-peng, NIU Dong-ling, WANG Yan, LI Xiao, MENG Qing-kuan, LIU Gang
|
| (Key Laboratory of Modern Precision Agriculture System Integration Research, Ministry of Education/Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture/College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China) |
| Abstract: |
| Surveying a farmland before leveling rapidly and accurately can provide solutions for land leveling projects.In order to solve the problems of low accuracy and efficiency in the field measurement, a rapid survey method of farmland terrain was proposed.Firstly, 3D data of discrete points of boundary and internal were collected dynamically using RTK-GNSS.Secondly, a digital elevation model was generated using the method of triangulation with linear interpolation.Finally, the area was calculated with corrected track method, and the method of least squares was used to fit plane equation to calculate the slope and other information.On this basis, an integrated collection terminal and a data processing software were designed and then tested with American FieldLevel Ⅱ system.The results showed that the system worked stably with high positioning accuracy and efficiency.Compared with the results of FieldLevel Ⅱ system, the consolidated relative average error rate of the system was about 8.19%, which could meet the need of terrain surveying for precision field leveling. |
| Key words: terrain survey RTK-GNSS joint positioning integrated collection terminal data processing software |
