Very recently {terra} has added SpatNetwork which utilizes/works-with GNM:
https://github.com/rspatial/terra/blob/master/src/spatNetwork_gnm.cpp so
that might be of interest.Cheers, Mike On Wed, May 27, 2026 at 6:26 PM Even Rouault via gdal-dev < [email protected]> wrote: > Hi Alex, > > More than ten years ago, two features were added to GDAL during GSoC > > projects: the raster correlator [0] and support for the Geographic > > Network Model (GNM) [1]. Both features seem to have remained > > limited/experimental, with almost no activity except for code > > formatting and compilation fixes. > True > > As far as I know, they also are > > rarely included in default builds by major distributions/packages, > Are you sure about that ? The raster correlator is part of the build and > cannot be disabled easily, and even if GNM can be disabled, it is on by > default. Debian or conda-forge builds include it for example > > the correlator API is not exposed via SWIG. > True > > > > I wonder what is the status and future of this code? Are there any > > plans to improve and expose it, or is the project leaning toward > > deprecation and removal to reduce maintenance overhead? > > I was also wondering lately. We also don't see bug reports or questions > related to them, so they might be little used. > > And the fact that gnmanalyze & gnmmanage haven't been ported to the new > CLI will not help build awareness around them. > > Those features don't get that much in our way so there's no immediate > need to consider deprecation > > > In the past I developed an experimental QGIS plugin that uses GDAL GNM > > via Python bindings and considered exposing the correlator as well. > In the same plugin ? > > I would love to hear your thoughts on the future of these two features > > before investing further into plugins, and potentially to the GDAL. > > It might be a chicken & egg problem: not enough exposed ==> not enough > used ==> no feedback ==> no change. > > But what's true is that the original developers are apparently no longer > available (I pinged recently for a GNM related pull request and got no > feedback). > > Even > > -- > Very grumpy about LLMs: FOSS is about increasing public capital, > not becoming enslaved to private equity of giga corporations > -- > http://www.spatialys.com > My software is free, but my time generally not. > > _______________________________________________ > gdal-dev mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Michael Sumner Research Software Engineer Australian Antarctic Division Hobart, Australia 0438489030 e-mail: [email protected]
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