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Question

How to smooth the surface of a resampled DTM raster?

K
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Hello everyone!

 

There were two adjacent DTMs with different resolutions(one is 0,5m and the other is 5m.). I resampled them to bring together and mosaick at 1m resolution. There seems to be no problem with 0,5m res. area in the mosaicked image, but after the resolution is reduced for 5m area, defects like a stair steps appear in 3D view(as seen in the image). So, how can i get a smoother suface for the downsampled area from 5m to 1m. Which transformers or parameters should i use in my workflow.

Thanks a lot.

 

@daleatsafe @daveatsafe @takashi @jovitaatsafe @redgeographics @deanatsafe @rylanatsafe @hollyatsafe @lenaatsafe @annabelleatsafe @steveatsafe

2 replies

B
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You could try the RasterConvolver to smooth a raster. The filter Blur:Box will smooth the raster. Under Kernel options you can set the size. A larger size will smooth the raster more.

jdh
Rank
Badge +22

I suggest instead of resampling and mosaicking the rasters, you use a surfaceModeller/RasterDEMGenerator with a grid spacing of 1m.

 

 

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