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Contours: Creating individual layers from DEM and cleaning them up.

Question asked by bwanamukubwa on Jul 15, 2015
Latest reply on Jul 15, 2015 by bwanamukubwa

Hello,

 

I'm trying to fabricate a model from wood of contour lines to look something like this: https://i.ytimg.com/vi/7w3yRp3Xqp8/hqdefault.jpg

 

I'd like to create individual files that have contour lines for each elevation such that i can use a laser cutter to make the individual layers to assemble the model.

 

My workflow so far is as follows in QGIS:

 

- Add raster layer from DEM

- Raster > Extraction > Contour to add the contours

- Vector > Data Mgmt Tools > Split Vector Layer

 

This gives me multiple files each one showing the contours per elevation.

 

My first issue is that the contours are jagged as shown in the picture attached and the second issue is i'd like to get rid of the really small contours to keep it simple.

 

So is there a way to 'smooth' the lines and set a 'tolerance' for minimum contour width or length for example?

 

Thanks in advance!

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