[Qgis-user] How to replicate ARC-GIS Natural Neighbour Interpolation Algorithm in QGIS / DTM from elevation points

[Richard McDonnell]

Hi,
In addition to what Jurijsy suggested you can also use gdaldem. You can access this in QGIS by selecting Raster from the toolbar and the selecting Analysis and Grid Nearest Neighbour. If using Windows and an OSGeo4W install, you can utilise the OSGeo4W Shell to run the same command via command line.
Regards,

Richard



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From: Qgis-user <qgis-user-bounces at lists.osgeo.org> On Behalf Of Micha Silver
Sent: 08 September 2021 14:04
To: Jurijs Kondratenko <yurikondratenko at inbox.lv>; qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] How to replicate ARC-GIS Natural Neighbour Interpolation Algorithm in QGIS / DTM from elevation points

If your'e willing to try GRASS GIS, then the module v.surf.nnbathy should help.
https://grass.osgeo.org/grass78/manuals/addons/v.surf.nnbathy.html


On 9/8/21 11:08 AM, Jurijs Kondratenko wrote:
Hi, I'm building a DTM from random points (with different distances in between) and I like ArcGIS Natural Neighbour algorithm for doing so.
Is there any way to replicate it in QGIS? https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-analyst/how-natural-neighbor-works.htm
Alternatively, what would be a way to constructing DTM from points, preserving the original points in respective pixels?
Thank you!
Jurijs Kondratenko
Riga Technical University





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Micha Silver

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