Lasgrid and more that 504 files

[Dave....@mffp.gouv.qc.ca]

Hy,

 

Have you ever had problems with projects of more than 504 tiles with lasgrid. On two of the computer on which I work the treatments suddenly stop after the 504th tiles.

 

Why ?

 

The command line is :

 

Lasgrid -lof C:\Users\munda1\AppData\Local\Temp\arcA0BC\\listLAS.txt -otif -drop_y_below 4980000.00 -drop_class 7 -step 0.7 -odir D:\2016\02301\Secteur\I\Raster\Synthese\DSM -first_only -highest -elevation -fill 10  -use_tile_bb -mem 1900

 

Salutations !

Dave Munger

Analyste en géomatique et LiDAR
Unité de gestion Rivière-Péribonka

Direction de la gestion des forêts du Saguenay-Lac-St-Jean
Ministère des Forêts, de la Faune et des Parcs
801, chemin du Pont-Taché Nord, bureau RC-03 

Alma (Québec)  G8B 5B7
Téléphone : 418 668-8319, poste 370
dave....@mffp.gouv.qc.ca
mffp.gouv.qc.ca

 

[Martin Isenburg]

Hello,

the only thing that I can think of that there is - for some reason - a memory leak that accumulated data over time. If you can check the total memory footprint of the process in the moment it fails and it is close to 2 GB then this would explain it. 

An easy work around is something you should do in any case (if you are on a multi-core machine). Process the tiles on more than one processor my adding the option '-cores 2' or  '-cores 4' to the command line. Now each tile is started by a fresh process so the memory leak - should it exist - will not accumulate over time any longer,

Does that work for you?

Regards,

Martin @rapidlasso

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[Dave Munge]

Great !

The case is closed. By using -core the problem is resolved.

Thank you Martin!