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[mkgmap-dev] DEM: performance with bicubic interpolation

From Gerd Petermann gpetermann_muenchen at hotmail.com on Tue Jan 23 16:55:42 GMT 2018

Hi all,

see http://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=4081

Please ignore run time of bicubic-spline method for now, I think optimized version should be as slow as bicubic, at the moment it is slower.


Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von osm at pinns <osm at pinns.co.uk>
Gesendet: Dienstag, 23. Januar 2018 17:16:17
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] DEM: performance with bicubic interpolation

Hi Gerd and Andrzej

I think that makes sense top make it more flexible.

I found the following interpolation



On 23/01/2018 15:28, Andrzej Popowski wrote:
> Hi Gerd,
> maybe we can wait a bit with optimization? What I would like to get is
> an option for mkgamp, that will allow for testing quality of all these
> versions of interpolation. For now we have bilinear, bicubic and
> bicubic spline. This all could be included in code and selected by user.

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