Description
The orthophotography of 2001 was produced by the Department of Calvados and 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 2001 orthophotography is freely distributed under an open licence thanks to the financial support of the Department of Calvados.
Collection context
The original files distributed by the Department of Calvados under Open License are:
- in projection NTF (Paris) / Lambert zone I (EPSG: 5707);
- in ECW "lossless" format per 2.5 km x 6 km slab;
- with a resolution of one pixel = 30 cm;
- compressed as a zip archive.
In order to facilitate the use of the tiles composing the orthophoto 2001, we also offer a pyramid in GeoPackage OGC format in lambert 93.
Collection method
gdalbuildvrt D:\4_Ortho_2001\2001.vrt -addalpha -srcnodata 255 -hidenodata -a_srs EPSG:5707 D:\4_Ortho_2001\data\*.ecw
gdalwarp D:\4_Ortho_2001\2001.vrt D:\4_Ortho_2001\2001.gpkg -s_srs EPSG:5707 -t_srs EPSG:2154 -r cubic -of GPKG
gdaladdo -r cubic D:\4_Ortho_2001\2001.gpkg 4 16 64 256
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| Ortho 2001 | Unknown | Open resource |