Orthophotography — BD ORTHO® 2012 (reformatted) — Calvados

The 2012 ORTHO® BD is a collection of digital mosaics of colour orthophotographs, rectified in the specific legal projection adapted to the covered territory.

The 2012 ORTHO® BD offers many advantages:
— spatial planning: land tenure, land use and new communication channels;
— environment: coastal and forest observatory, bocage management;
— communication: visualisation of the evolution of the territory.

The original files produced and distributed by the IGN under Open License are:
— in legal projection (Lambert 93 in metropolis and other specific projection for each DOM)
— in ECW format per slab of 5 km x 5 km
— with a resolution of one pixel = 20 cm;
— compressed as a zip archive.

Below you will find links to access “multi-party” files for free download. To unzip “multi-parts” files:
— Make sure you have downloaded all the parts: 001, 002, 003...
— Put all parts in the same directory
— Click on file 001 (e.g. ecw_2012.zip.001). No need to click 002, 003, 004... Open file.001 opens all other parts of the archive
If you have an error there is a good chance that one of your files was only partially downloaded.

In order to make it easier to use the tiles composing the orthophoto 2012, we offer a pyramid in GeoPackage OGC format in lambert 93. The Geopakage was produced from the GDAL library

“’
gdalbuildvrt D:\Ortho_2012\2012.vrt -addalpha -srcnodata 255 -hidenodata -a_srs EPSG:2154 D:\Ortho_2012\data*.ecw

gdalwarp D:\Ortho_2012\2012.vrt D:\Ortho_2012\2012.gpkg -s_srs EPSG:2154 -t_srs EPSG:2154 -r cubic -of gpkg

gdaladdo -r cubic D:\Ortho_2012\2012.gpkg 4 16 64 256
“’