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I have been trying to grid a point cloud, version1.2, LiDAR datasets which are intended to be used for hydraulic simulation of flood propagation. Already, I have used Arc* to work on the traditional (.las) format, to create lasdataset. Then, a raster dataset was created from the lasdataset and finally interpolated by means of a nearest neighbour algorithm. The interpolated raster data were exported as txt files.
Having gone through this routine, I expected a result with header file as well as regular values in X, Y and Z orthogonality. Instead, the result I got was distorted sets of (real) numbers I could not make sense of. I tried using Surfer* to grid txt files created from (.las) point clouds, by means of lastools*, but the result was a binary file and I couldn’t read it. Lastools* gave a reasonable result when used to grid the point clouds, only that the cell size varies inversely with the number of cells that result in the output grid.
My challenge is how to grid the point cloud LiDAR and specify the number of rows and columns to be contained in the resulting gridded data, giving a fixed cell size.