摘要
为研究地面坡度对土方量精度的影响,利用地面三维激光扫描技术、GNSS RTK技术及航空遥感技术采集的宁夏22个不同坡度区域地形数据,在Arc GIS 9.0环境下建立数字高程模型(DEM)并进行地面坡度分析,基于DEM方法进行土方计算,以原始采样数据土方量为准值测定各研究区域的土方量精度,通过方差分析和回归分析,建立土方量相对误差随平均坡度及采样间距的回归模型。结果表明,平均坡度对土方量相对误差影响显著,土方量相对误差整体上并没有随平均坡度变化呈现明显增大或减小的规律,而随平均采样间距的变化更为明显。
In order to study the effect of slope accuracy earthwork precision, the terrain data of 22 different slopes of Ningxia, which was collected based on the terrestrial laser scanning(TLS) technology, GNSS RTK technology and airborne remote sensing technology, was used to establish DEM and ground slope analysis in Arcgis 9.0. Based on DEM, the earthwork of the original sample data was used to determine the earthwork precision. By means of variance analysis and regression analysis, the nonlinear regression model of earthwork relative error with the average slope & sampling interval was established. The results show that average slope has a significant effect on earthwork relative error, but earthwork relative error does not significantly increase or decrease along with the average slope, it changes obviously with mean sampling interval.
出处
《宁夏工程技术》
CAS
2016年第2期181-185,共5页
Ningxia Engineering Technology
