README.md

Generate tiles scan 1000

Deps

Need GDAL 3.1+ or at least latest gdal2tiles.py file https://github.com/OSGeo/gdal/blob/master/gdal/swig/python/scripts/gdal2tiles.py with a lower GDAL version, 7zip and wget installed

Commands to execute

wget ftp://SCAN_1000_ext:Jee3choh6iezooce@ftp3.ign.fr/SCAN1000_2-1__JP2-E100_LAMB93_FXX_2020-02-01.7z.001
7z x SCAN1000_2-1__JP2-E100_LAMB93_FXX_2020-02-01.7z.001
cd SCAN1000_2-1__JP2-E100_LAMB93_FXX_2020-02-01/SCAN1000/1_DONNEES_LIVRAISON_2020-03-00188/SC1000_JP2-E100_LAMB93_FXX/
gdalbuildvrt -a_srs epsg:2154 scan1000.vrt *.jp2
# Need GDAL 3.1 for --xyz option or take the latest file from https://github.com/OSGeo/gdal/blob/master/gdal/swig/python/scripts/gdal2tiles.py
gdal2tiles.py --s_srs="EPSG:2154" --xyz --zoom=2-10 scan1000.vrt output_folder

Serve tiles locally

We use http-server Node.js utility to serve local directory. We consider you are in directory SCAN1000_2-1__JP2-E100_LAMB93_FXX_2020-02-01/SCAN1000/1_DONNEES_LIVRAISON_2020-03-00188/SC1000_JP2-E100_LAMB93_FXX/ before running the following:

http-server # Node.js utility to serve local directory

Consume now in QGIS

Add in "XYZ Tiles" url the following

• Name: Demo scan 1000
• URL: http://127.0.0.1:8080/output_folder/{z}/{x}/{y}.png
• Min zoom level: 2
• Max zoom level: 10

Then, add the layer to the map in QGIS