I like to close gaps in a raster layer using the Module Close Gaps of Saga. I can not find which interpolation method is used by the module. Which method is used by the module and/or where can I find out?


1 Answer 1


According to this R-sig-Geo forum question, it seems the Close gaps tool uses the Nearest Neighbour interpolation method. The following is quoted from the webpage (emphasis mine):

Q. Would anyone know a good way to fill in holes within a DTM? There is no data inside these holes and it is affecting my calculations, so I prefer for an interpolation of the nearest neighbors to fill in a value or something similar.

A. There is a very efficient function in SAGA called "Close Gaps" that does exactly that. What makes it especially efficient is that it allows you to set a mask map.

  • This is excactly what I am searching for. Does anyone know, where I can find this information in a qhotable way?
    – Moo
    Commented Feb 7, 2017 at 10:15
  • @Moo - If there is, it's not easy to find unfortunately...
    – Joseph
    Commented Feb 7, 2017 at 10:47

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