[pgpointcloud] Overlapping patches

[Nilesh Vyavahare]

Hello everyone,

I have two questions that you might be able to help me with.

1) I am using PDAL pcpipeline to upload some data into Postgres. In the pcpipeline I have specified to split the data into the patches of 400 points. >From the demonstration example I understand that the patches will not be overlapping but when I look at the extents of patches (and the points themselves) they appear to be overlapping. I have attached the pipeline xml I am using. Am I missing some trick here?

One of the possible reason I could think of could be, specifying less than total number of file points in the "cache_block_size" option. But I am making sure that I am specifying more points than in the entire file so that the entire file could be cached for patching. Has anyone come across this before?

2) Another thing I was wondering is that, in PDAL you have one filter called "filters.hexabin" which is supposed draw an outline around the patch. At the moment the only way I could get the patch extent out, is to write out an xml file. Is there any way to write that extent into PostGIS directly next to the patch?

Just a note, in case you are specifying pre_sql/post_sql inside your pipeline, specifying the SQL statement inside the pipeline xml file didn't work for me so I had to write SQL statement in some other file and put the location of that sql file in there and it worked.

Thanks in advance for your help.

Regards,
Nilesh

Nilesh Vyavahare
Senior GIS Analyst, SeaZone

E: nilesh.vyavahare at seazone.com<mailto:nilesh.vyavahare at seazone.com>
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