[gdal-dev] Problems with GDAL_GRID

[Even Rouault]

Dave,

you might want to try with the latest GDAL 2.3.2
There has been a bug fixed in that one that could potentially fix the issue 
you have:
https://github.com/OSGeo/gdal/issues/638

Even

> I am hoping that someone receiving this email might be able to help me or
> direct me to someone else who can. Please excuse me if this is an
> inappropriate use of your mailing list or attachment format.
> 
> I am attempting to use GDAL_GRID with linear interpolation to generate a
> TIF-file and polygonized SHP-file, from a TXT-file of 3D point data
> generated by a single-beam echo-sounder which collects detailed river
> cross-sections typically at every 50 - 100 m intervals down a river.
> 
> We currently have a database of over 2100 bathymetric (underwater) surveys
> and have been successfully using an ArcGIS macro, but for a number of
> reasons I was hoping to migrate away from ArcGIS and use GDAL_GRID instead
> for batch input. The point data files work fine in both QGIS and ArcGIS,
> but not in GDAL_GRID. I am continuously getting 'blocks' of random 'No
> Data'-areas in my output (refer to attachment). I am wondering if this is a
> flaw in the GDAL_GRID program or if I am not using it correctly, and
> whether there is an alternative program that might be more stable.
> 
> I have prepared a PDF file which documents and summarizes the problem if
> anyone is interested.
> 
> Any advise you might be able to give me would be MUCH appreciated!
> 
> Thank you in advance.
> 
> Regards, David Burkholder


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