Bulletin of Surveying and Mapping ›› 2021, Vol. 0 ›› Issue (8): 129-134.doi: 10.13474/j.cnki.11-2246.2021.0256

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Using FME and VBA to extract the elevation data of airport grid

LI Chengpeng, YANG Yuanxin, ZHANG Yunming   

  1. Beijing Zhongtianlutong Engineering Exploration & Surveying Co., Ltd., Beijing 100124, China
  • Received:2021-02-24 Revised:2021-06-21 Online:2021-08-25 Published:2021-08-30

Abstract: The ground of the point cloud classification after get point cloud data currently in LAS cannot completely applied to design software for design calculation. Through the screening of the proposed technical scheme, the method of using the data processing function of FME Workbench combined with VBA programming to provide the plane data of external grid is proposed. In the FME Workbench, the ground point cloud data is used to construct TIN, the grid elevation data is extracted from TIN by point-by-point interpolation method, the contour line is generated, the corresponding graphic processing and the output of results are achieved, and the effectiveness of the method is demonstrated by the actual calculation examples.

Key words: FME, VBA, LAS, airport, grid, TIN, contour

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