Or a grouping function that returned the cell index for neighbours and weighting that are involved in whatever calculation summary is wanted.
Maybe the warper could return this as a starting point rather than doing the "task at hand". ? On Wed, Apr 24, 2024 at 8:51 PM Even Rouault via gdal-dev < gdal-dev@lists.osgeo.org> wrote: > Hi, > > I guess this discussion, and past similar ones, calls for an enhancement. > A new API function, like CPLErr > GDALRasterInterpolateAtPoint(GDALRasterBandH, double dfPixel, double > dfLocation, GDALRIOResampleAlg eInterpolation, double *pdfValue), that > could be used by a new mode of gdallocationinfo. The GDALRPCGetDEMHeight() > function in alg/gdal_rpc.cpp is a plausible candidate implementation for > bilinear and bicubic (we could potentially restrict to that at the moment). > > Even > Le 24/04/2024 à 10:33, Javier Jimenez Shaw via gdal-dev a écrit : > > Hi > > I would like to read in QGIS or GDAL an interpolated value in a DSM (well, > actually it is a geoid model, but it is the same behaviour). See that I do > not want the pixel value, but the linear interpolation among the neighbour > pixels, assuming that the pixel value is in the center of the pixel. > For instance, this file > https://www.isgeoid.polimi.it/Geoid/Asia/Japan/japan2000_g.html > > Is there any way to get it (without implementing the interpolation myself)? > If I understood correctly gdallocationinfo is not interpolating, just > giving the pixel value. > > Thanks > > .___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__ > > _______________________________________________ > gdal-dev mailing > listgdal-dev@lists.osgeo.orghttps://lists.osgeo.org/mailman/listinfo/gdal-dev > > -- http://www.spatialys.com > My software is free, but my time generally not. > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Michael Sumner Software and Database Engineer Australian Antarctic Division Hobart, Australia e-mail: mdsum...@gmail.com
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