Aerial photography [Orthophotography] - Department of Calvados - 2001
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 |
|
0 |
|
https://www.data.gouv.fr/api/1/datasets/r/410fcbf5-326a-4c0f-98a5-a868ae518e35 |
Tags
- photo-aerienne
- calvados
- haute-resolution