Aerial photography [BD ORTHO® - IGN-F] - Department of Calvados - 2012

The 2012 ORTHO® comic book is a collection of digital mosaics of color orthophotos, rectified in the specific legal projection adapted to the territory covered. The 2012 ORTHO® comic book offers many advantages: - Spatial planning: land use, land consumption and new communication routes; - environment: coastal and forest observatory, bocage management; - Communication: visualization 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 mainland France and other specific projection for each French overseas department) - in ECW format per 5km x 5km slab - with a resolution of one pixel = 20 cm; - compressed as a zip archive. You will find below the links to access the "multi-part" files for free download. To unzip the "multi-part" files: - Make sure you have downloaded all parts: 001, 002, 003... - Put all the parts in the same directory - Click on file 001 (ex: ecw_2012.zip.001). No need to click on 002, 003, 004... Opening the .001 file opens all other parts of the archive If you have an error, chances are that one of your files has only been partially downloaded. In order to make it easier to use the tiles composing the orthophoto 2012, we propose a pyramid in GeoPackage OGC format in lambert 93. **Collection method** The Geopakage was produced from the GDAL library: * gdalbuildvrt D:\7_Ortho_2012\2012.vrt -addalpha -srcnodata 255 -hidenodata -a_srs EPSG:2154 D:\7_Ortho_2012\data\*.ecw * gdalwarp D:\7_Ortho_2012\2012.vrt D:\7_Ortho_2012\2012.gpkg -s_srs EPSG:2154 -t_srs EPSG:2154 -r cubic -of GPKG * gdaladdo -r cubic D:\7_Ortho_2012\2012.gpkg 4 16 64 256 For more information, see [Isogeo Catalog Metadata](https://open.isogeo.com/s/434296189d794266a04a8678e256f0c4/HiLeps3y1qrSx6aTDmKyp0spGPix0/r/6801f773803d4a639c4382bae93051e6).