Hi Aitor,
I've never used the image option in spdpmfgrd, what I normally do is use this
to classify the points and the run spdinterp. See
https://spectraldifferences.wordpress.com/2014/08/06/dem-spdlib/
Hope this helps,
Dan
> On 31 May 2017, at 10:53, AITOR BASTARRICA <aitor.bastarr...@ehu.eus> wrote:
>
> I was trying to obtain a ground raster using spdmfgrd function. These are the
> steps of the processing (SPDLIB 3.3.309 version)
> 1. Convert a LAZ file into SPD with spdtranslate
> 2. Remove the noise with spdrmnoise
> 3. Delete the previous classes with spdclearclass
> 4. I obtain the following error message running the spdpmfgrd (no error if I
> don't use the --image option).
>
>
> spdpmfgrd --maxfilter 20 --gdal GTiff --image -i
> /media/geom/DISCO2/temp/Lidar_tmp1/1797/1797_noclass.spd -o
> /media/geom/DISCO2/temp/1797_grd.tif
>
> spdpmfgrd SPDLib 3.3.309, Copyright (C) 2016 Sorted Pulse Library (SPD)
> This program comes with ABSOLUTELY NO WARRANTY. This is free software,
> and you are welcome to redistribute it under certain conditions; See
> website (http://www.spdlib.org). Bugs are to be reported on the trac
> or directly to spdlib-develop@lists.sourceforge.net
> Using native resolution for processing
> Processing block 1 of 21 blocks
> Processing block 2 of 21 blocks
> Processing block 3 of 21 blocks
> Processing block 4 of 21 blocks
> Processing block 5 of 21 blocks
> Processing block 6 of 21 blocks
> Processing block 7 of 21 blocks
> Processing block 8 of 21 blocks
> Processing block 9 of 21 blocks
> Processing block 10 of 21 blocks
> Processing block 11 of 21 blocks
> Processing block 12 of 21 blocks
> Processing block 13 of 21 blocks
> Processing block 14 of 21 blocks
> Processing block 15 of 21 blocks
> Processing block 16 of 21 blocks
> Processing block 17 of 21 blocks
> Processing block 18 of 21 blocks
> Processing block 19 of 21 blocks
> Processing block 20 of 21 blocks
> Processing block 21 of 21 blocks
> Complete
> *** Error in `spdpmfgrd': free(): invalid next size (fast):
> 0x0000000002e73b90 ***
> Aborted
>
> Any hint would be greatly appreciated,
> Best,
> Aitor
>
>
>
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