摘要
地形变化复杂或者较大的区域,单一的拟合模型难以满足精度要求和实际工程的需要,采用分区拟合的方法解决这一问题。分区后的各区都包含一定的重合区域,称之为缓冲区。通过研究不同宽度的缓冲区得出缓冲区拟合成果的差值。并且在分区结束之后对GPS水准点进行了选点,选出合适的拟合点和检查点[1]。拟合点参与拟合过程,检查点则用来检验拟合精度。选择了有限元法进行拟合,比较了在各分区中缓冲区的拟合成果。
In larger area or in the complex change of terrain area, single fitting model is hardly to satisfy the requirement of accuracy and practical engineering; therefore, zoning fitting method is effective to solve this problem. The partition of dis- trict contains certain superposition region, which is called the buffer. Through the research of different width of buffer, get the buffer fitting results, and after the end of the partition on the GPS leveling points were selected points, which chooses the proper fitting point and checkpoints. The fitting point participate in the fitting process, checkpoint fitting is used to test accuracy. Choose the finite element method to process, and then compare the production of fitting in the buff- er of each subareas.
出处
《北京测绘》
2013年第5期19-22,共4页
Beijing Surveying and Mapping
关键词
GPS水准
分区
缓冲区
拟合点
检查点
有限元法
拟合精度
GPS leveling
subarea
the buffer
the fitting points
the checkpoints
finite element
fitting precision.
