Le portail francophone de la géomatique

Bonjour,

Je post ce message car j'ai un message d'erreur lorsque j'essaie créer un raster virtuel sous Qgis (dernière version).
J'ai sélectionné les dalles raster en format JP2 selon mon périmètre d'étude
et lorsque je sélectionne : menu > divers > construire un raster virtuel > executer.

Voici le message d'erreur :

Traitement de l'algorithme…
Démarrage de l'algorithme 'Construire un raster virtuel'…
Input parameters:
{ 'ADD_ALPHA' : False, 'ASSIGN_CRS' : None, 'INPUT' : '', 'OUTPUT' : 'C:/Users/NAME/AppData/Local/Temp/processing_0967ae5ec0b049aaada2a1c3b3ccbd77/855b077b1cdc4d93965f80271819754d/OUTPUT.vrt', 'PROJ_DIFFERENCE' : True, 'RESAMPLING' : 0, 'RESOLUTION' : 0, 'SEPARATE' : False, 'SRC_NODATA' : '' }

GDAL command:
gdalbuildvrt -resolution average -allow_projection_difference -r nearest -input_file_list C:/Users/NAME/AppData/Local/Temp/processing_0967ae5ec0b049aaada2a1c3b3ccbd77/91436b1ed7424654bf389937aec6e6fd/buildvrtInputFiles.txt C:/Users/NAME/AppData/Local/Temp/processing_0967ae5ec0b049aaada2a1c3b3ccbd77/855b077b1cdc4d93965f80271819754d/OUTPUT.vrt
GDAL command output:
ERROR 1: No input dataset specified.

Usage: gdalbuildvrt [-tileindex field_name]

[-resolution {highest|lowest|average|user}]

[-te xmin ymin xmax ymax] [-tr xres yres] [-tap]

[-separate] [-b band] [-sd subdataset]

[-allow_projection_difference] [-q]

[-addalpha] [-hidenodata]

[-srcnodata "value [value...]"] [-vrtnodata "value [value...]"]

[-a_srs srs_def]

[-r {nearest,bilinear,cubic,cubicspline,lanczos,average,mode}]

[-oo NAME=VALUE]*

[-input_file_list my_list.txt] [-overwrite] output.vrt [gdalfile]*



e.g.

% gdalbuildvrt doq_index.vrt doq/*.tif

% gdalbuildvrt -input_file_list my_list.txt doq_index.vrt



NOTES:

o With -separate, each files goes into a separate band in the VRT band.

Otherwise, the files are considered as tiles of a larger mosaic.

o -b option selects a band to add into vrt. Multiple bands can be listed.

By default all bands are queried.

o The default tile index field is 'location' unless otherwise specified by

-tileindex.

o In case the resolution of all input files is not the same, the -resolution

flag enable the user to control the way the output resolution is computed.

Average is the default.

o Input files may be any valid GDAL dataset or a GDAL raster tile index.

o For a GDAL raster tile index, all entries will be added to the VRT.

o If one GDAL dataset is made of several subdatasets and has 0 raster bands,

its datasets will be added to the VRT rather than the dataset itself.

Single subdataset could be selected by its number using the -sd option.

o By default, only datasets of same projection and band characteristics

may be added to the VRT.

Execution completed in 0.08 seconds
Results:
{'OUTPUT': 'C:/Users/NAME/AppData/Local/Temp/processing_0967ae5ec0b049aaada2a1c3b3ccbd77/855b077b1cdc4d93965f80271819754d/OUTPUT.vrt'}

Chargement des couches de résultat
Les couches suivantes n'ont pas été générées correctement.<ul><li>C:/Users/NAMEi/AppData/Local/Temp/processing_0967ae5ec0b049aaada2a1c3b3ccbd77/855b077b1cdc4d93965f80271819754d/OUTPUT.vrt</li></ul>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.


Apparemment des couches n'ont pas été générées correctement, mais pourquoi ? Et comment les générer "correctement" ?

Je vous remercie d'éclairer un peu ma lanterne !