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Hi

 

I want to make a DSM from a pointcloud.

I have used the rasterDEMgenerator and the imagerasterize.

 

They both work and I get a good result, but only visual. When I load the DSM in Qgis and start to sample it, I get the color codes or something instead of the height.

 

I can't seem to find a way to change that.

 

This is how I I would like it:

 

1This is the result I get with:

1a 

This is how I would like it:

2 

this is my result:

2a 

This is my workbench:3I did change the rasterinterpretationcoercer to gray8, so now I also get one band, but it's still not the height.

The imagerasterizer has only color or intensity as input component...

I think the rasterdemgenerator is based on the imagerasterizer I think so now I don't know if it's possible with one of these transformers.

 

I also tried to replace the intensity with the Z value, but that didn't work.

 

Does anybody know how to do it?

 

 

 

Hi @koenvdw​ ,

According to the help, the RasterDEMGenerator should create a numeric raster with a single Real64 band always. I don't think you need to use RasterMosaicker and RasterInetepretationCoercer at all.

If you load the resulting raster with FME Data Inspector, how are its properties shown in the Feature Information window?

> I have used the rasterDEMgenerator and the imagerasterize.

 

Did you use the ImageRasterizer?​ The resulting raster created with the ImageRasterizer could be RGB or RGBA color image.

You can just use a RasterDEMGenerator to create a DMS raster. No need to any other transformers.

Hi Takashi

 

Thanks for the help. I changed the workbench to this:

 

4 

You were right. There is no need to use other transformers.

 

I thought I tried this first and I didn't get the result I'm getting now. I cleared fme cache and rebooted pc. Now it works... Maybe I did something else wrong the first time.

 

The only thing is I'm getting a bit of noise around the wall's of buildings. Is there a way to clean that up?

 

Example:

5 

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