VPC Virtual Point Cloud - Error when creating VPC from HTTPS/URI sources

[P-SLISSE]

What is the bug or the crash?

Hello,
When creating VPC with point cloud available in my personnal hard drive, the processing is OK.

But when I create a VPC with the processing tool, using copc.laz files available on cloud storage (https/uri), the processing stop with error

For me, it's really powerfull to create VPC from cloud stored data

For responsible digital : datas are stored one time, and can be used worldwide (without need to upload all the datas before using them)

Steps to reproduce the issue

1. Import copc.laz files from https/uri
   You can use this URLs
   https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1050_6841_PTS_C_LAMB93_IGN69.copc.laz
   https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1051_6841_PTS_C_LAMB93_IGN69.copc.laz
   OR
   https://s3.eu-west-2.wasabisys.com/ems-sgct-photomaillage/DATA/TEST/VPC_DATA/2035500_7275500_LIDAR2021.copc.laz
   https://s3.eu-west-2.wasabisys.com/ems-sgct-photomaillage/DATA/TEST/VPC_DATA/2035000_7275500_LIDAR2021.copc.laz

2. Use the processing tool to create VPC
   
   I choose the 2 pointcloud entities (https://...), and I write the VPC file on my local harddrive
   I explicitely choose the *.vpc file format

3. The processing stops on error
   Version de QGIS : 3.40.1-Bratislava
   Révision du code : 989853a
   Version de Qt : 5.15.13
   Version de Python : 3.12.7
   Version de GDAL : 3.9.3
   Version de GEOS : 3.13.0-CAPI-1.19.0
   Version de Proj : Rel. 9.5.0, September 15th, 2024
   Version de PDAL : 2.8.1 (git-version: a06325)
   Algorithme commencé à: 2024-12-10T11:26:00
   Démarrage de l'algorithme 'Construire un nuage de points virtuel (VPC)'…
   Paramètres en entrée:
   { 'BOUNDARY' : False, 'LAYERS' : ['copc://https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1050_6841_PTS_C_LAMB93_IGN69.copc.laz','copc://https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1051_6841_PTS_C_LAMB93_IGN69.copc.laz'], 'OUTPUT' : 'D:/TMP/LIDAR2025/IssueVPC/VPCIGN.vpc', 'OVERVIEW' : False, 'STATISTICS' : False }

wrench command: C:/OSGeo4W/apps/qgis/./pdal_wrench.exe build_vpc --output=D:/TMP/LIDAR2025/IssueVPC/VPCIGN.vpc --threads=24 --input-file-list=C:/Users/230095/AppData/Local/Temp/processing_QiXqSO/2b19f486442044dfb8fdfe696f56717e/inputFiles.txt

Le processus s'est arrêté de façon inattendue
L'exécution a échoué après 261.08 secondes (4 minutes 21 secondes)

Chargement des couches de résultat
Les couches suivantes n'ont pas été générées correctement.
• D:/TMP/LIDAR2025/IssueVPC/VPCIGN.vpc
Vous pouvez vérifier le Panel de messages du journal dans la fenêtre principale de QGIS pour trouver plus d'informations à propos de l'exécution de l'algorithme.

Versions

Version de QGIS	3.40.1-Bratislava
Révision du code	989853a7
Libraries
Version de Qt	5.15.13
Version de Python	3.12.7
Version de GDAL/OGR	3.9.3
Version de Proj	9.5.0
Version de la base de données du registre EPSG	v11.016 (2024-08-31)
Version de GEOS	3.13.0-CAPI-1.19.0
Version de SQLite	3.46.1
Version de PDAL	2.8.1
Version du client PostgreSQL	16.2
Version de SpatiaLite	5.1.0
Version de QWT	6.3.0
Version de QScintilla2	2.14.1
Version de l'OS	Windows 10 Version 2009
Extensions Python actives
db_manager	0.1.20
grassprovider	2.12.99
MetaSearch	0.3.6
processing	2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response

[saberraz]

It works fine in QGIS 3.40. See the attached zip file.
output.zip

[P-SLISSE]

It works fine in QGIS 3.40. See the attached zip file. output.zip

Hello,
I'm also in 3.40 (3.40.1)
Can you explain how you manage to produce the VPC file ?
What did you differently from my processing description above ?

[agiudiceandrea]

@saberraz, I can also confirm the issue using QGIS 3.41.0-Master da86bc1 (OSGeo4W) on Windows 10 and following the provided steps with the first 2 URLs.

QGIS version: 3.41.0-Master
QGIS code revision: da86bc17a6
Qt version: 5.15.13
Python version: 3.12.7
GDAL version: 3.11.0dev-d00d363d94
GEOS version: 3.13.0-CAPI-1.19.0
PROJ version: Rel. 9.5.0, September 15th, 2024
PDAL version: 2.8.1 (git-version: a06325)
Algorithm started at: 2024-12-10T17:11:31
Algorithm 'Build virtual point cloud (VPC)' starting…
Input parameters:
{ 'BOUNDARY' : False, 'LAYERS' : ['copc://https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1050_6841_PTS_C_LAMB93_IGN69.copc.laz','copc://https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1051_6841_PTS_C_LAMB93_IGN69.copc.laz'], 'OUTPUT' : 'TEMPORARY_OUTPUT', 'OVERVIEW' : False, 'STATISTICS' : False }

wrench command: C:/OS022F~1/apps/qgis-dev/./pdal_wrench.exe build_vpc --output=C:/Users/Andrea/AppData/Local/Temp/processing_aQCcWF/329371e8ea724c7490d1ba135f9b81e2/OUTPUT.vpc --threads=4 --input-file-list=C:/Users/Andrea/AppData/Local/Temp/processing_aQCcWF/e14e9c606631439aad0f31034c1e948d/inputFiles.txt

Process was unexpectedly terminated
Execution failed after 270.37 seconds (4 minutes 30 seconds)

Loading resulting layers
The following layers were not correctly generated.
• C:/Users/Andrea/AppData/Local/Temp/processing_aQCcWF/329371e8ea724c7490d1ba135f9b81e2/OUTPUT.vpc
You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm.

C:/Users/Andrea/AppData/Local/Temp/processing_aQCcWF/e14e9c606631439aad0f31034c1e948d/inputFiles.txt contains:

https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1050_6841_PTS_C_LAMB93_IGN69.copc.laz
https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1051_6841_PTS_C_LAMB93_IGN69.copc.laz

QGIS version	3.41.0-Master
QGIS code revision	da86bc17a6
Libraries
Qt version	5.15.13
Python version	3.12.7
GDAL/OGR version	3.11.0dev-4cfbcf8285 (Compiled) 3.11.0dev-d00d363d94 (Running)
PROJ version	9.5.0
EPSG Registry database version	v11.016 (2024-08-31)
GEOS version	3.13.0-CAPI-1.19.0
SQLite version	3.46.1
PDAL version	2.8.1
PostgreSQL client version	16.2
SpatiaLite version	5.1.0
QWT version	6.3.0
QScintilla2 version	2.14.1
OS version	Windows 10 Version 1903
This copy of QGIS writes debugging output.
Active Python plugins
db_manager	0.1.20
grassprovider	2.12.99
MetaSearch	0.3.6
processing	2.12.99

[saberraz]

We are aware of the issue in master. The remote COPC crashes QGIS. There will be a fix soon for that.

But the OP is reporting about VPC creation from remote COPC in 3.40, which should work as expected.

[agiudiceandrea]

@saberraz, I didn't experience any crash using QGIS 3.41.0-Master while executing the processing algorithm "Build virtual point cloud (VPC)" (is there an issue report about such crash?), anyway the processing algorithm "Build virtual point cloud (VPC)" (pdal:virtualpointcloud) fails to properly execute.

I can confirm the issue occurs even using QGIS 3.40.1 on my Windows 10 system:

QGIS version: 3.40.1-Bratislava
QGIS code revision: 989853a7
Qt version: 5.15.13
Python version: 3.12.7
GDAL version: 3.9.3
GEOS version: 3.13.0-CAPI-1.19.0
PROJ version: Rel. 9.5.0, September 15th, 2024
PDAL version: 2.8.1 (git-version: a06325)
Algorithm started at: 2024-12-10T17:40:10
Algorithm 'Build virtual point cloud (VPC)' starting…
Input parameters:
{ 'BOUNDARY' : False, 'LAYERS' : ['copc://https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1050_6841_PTS_C_LAMB93_IGN69.copc.laz','copc://https://storage.sbg.cloud.ovh.net/v1/AUTH_63234f509d6048bca3c9fd7928720ca1/ppk-lidar/SE/LHD_FXX_1051_6841_PTS_C_LAMB93_IGN69.copc.laz'], 'OUTPUT' : 'TEMPORARY_OUTPUT', 'OVERVIEW' : False, 'STATISTICS' : False }

wrench command: C:/OS022F~1/apps/qgis/./pdal_wrench.exe build_vpc --output=C:/Users/Andrea/AppData/Local/Temp/processing_dMlcwR/62aa1b8fb8ef4bdab2b1a5c75b4eaaa8/OUTPUT.vpc --threads=4 --input-file-list=C:/Users/Andrea/AppData/Local/Temp/processing_dMlcwR/04c01cc6462642be8a6a623fc99aad97/inputFiles.txt

Process was unexpectedly terminated
Execution failed after 266.50 seconds (4 minutes 27 seconds)

Loading resulting layers
The following layers were not correctly generated.
• C:/Users/Andrea/AppData/Local/Temp/processing_dMlcwR/62aa1b8fb8ef4bdab2b1a5c75b4eaaa8/OUTPUT.vpc
You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm.

QGIS version	3.40.1-Bratislava
QGIS code revision	989853a7
Libraries
Qt version	5.15.13
Python version	3.12.7
GDAL/OGR version	3.9.3
PROJ version	9.5.0
EPSG Registry database version	v11.016 (2024-08-31)
GEOS version	3.13.0-CAPI-1.19.0
SQLite version	3.46.1
PDAL version	2.8.1
PostgreSQL client version	16.2
SpatiaLite version	5.1.0
QWT version	6.3.0
QScintilla2 version	2.14.1
OS version	Windows 10 Version 1903
Active Python plugins
db_manager	0.1.20
grassprovider	2.12.99
MetaSearch	0.3.6
processing	2.12.99

[jo-chemla]

Probably related, the french IGN datastore seem to have incorrect SSL certificate or HTTP to HTTPS redirection, see PDAL/wrench#33 (comment), which results in errors Curl failure: SSL peer certificate or SSH remote key was not OK. The above comment describes a procedure, based on proxying the ovh server to localhost, so that this works correctly.