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LiDAR Cloud Point (.las) to DEM Raster With Spectrum Colors Based On Elevation Values

  • July 9, 2018
  • 3 replies
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renosungis
Contributor
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Hello,

Is there a way to convert LiDAR Cloud Point (.las) to DEM Raster With Spectrum Colors Based On Elevation Values?

I see the following post (https://knowledge.safe.com/articles/1345/creating-a-raster-from-a-point-cloud.html), but just hope the expert may show me how to colorize the raster image with Spectrum Color like following image:

Thanks a lot,

Reno

Best answer by takashi

Hi @renosungis, a possible way is: convert the point cloud to a UInt8 DEM raster (see the article you have linked), create a color palette with the RGBGradationCalculator (from FME Hub), then add the palette to the DEM raster. See also this Q&A;: How To Transform DEM/DTM Gray8 TIF To RGB32 TIF With Color Based On Gray8 Value (elevation)

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3 replies

takashi
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  • takashiCelebrity
  • Best Answer
  • July 9, 2018

Hi @renosungis, a possible way is: convert the point cloud to a UInt8 DEM raster (see the article you have linked), create a color palette with the RGBGradationCalculator (from FME Hub), then add the palette to the DEM raster. See also this Q&A;: How To Transform DEM/DTM Gray8 TIF To RGB32 TIF With Color Based On Gray8 Value (elevation)

Why not inspect features with Visual/Data Preview and Feature/Record Information before writing them into a destination dataset?
renosungis
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  • renosungisContributor
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  • July 12, 2018

Hi @takashi,

Thanks a lot for your answer!

Just would like to share a good tool for generating the Seed Colors in RGB/HEX in a minute.

http://www.zonums.com/online/color_ramp/

After I have generated the custom color ramp, I copied the color ramp table to Google Sheets using a function called TEXTJOIN with character ";".

takashi
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  • takashiCelebrity
  • July 12, 2018

Hi @takashi,

Thanks a lot for your answer!

Just would like to share a good tool for generating the Seed Colors in RGB/HEX in a minute.

http://www.zonums.com/online/color_ramp/

After I have generated the custom color ramp, I copied the color ramp table to Google Sheets using a function called TEXTJOIN with character ";".

0684Q00000ArKiJQAV.png

0684Q00000ArJfoQAF.png

Thanks for sharing the good tool.

 

If the spacings (n) between adjacent fixed colors are identical, I think the RGBGradationCalculator with this Seed Colors could generate the same palette.

 

204,255,255;230,255,179;0,204,68;204,204,0;204,102,0;153,77,0;204,204,204;255,255,255

 


0684Q00000ArMKeQAN.png

 

0684Q00000ArMTZQA3.png

 

Why not inspect features with Visual/Data Preview and Feature/Record Information before writing them into a destination dataset?

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