High Resolution orthophotography — ORTHO® HR 2016 (reformatted) — Calvados
Description
The ORTHO® HR (High Resolution Orthophotography) of 2016 is a collection of digital mosaics of colour orthophotographs, rectified in the specific legal projection adapted to the covered territory.
The ORTHO® HR 2016 is freely distributed under an open license thanks to the financial support of the European Union and the Normandy Region. It is requested that all studies carried out from this database include the particular mention produced with the support of Europe and the Normandy Region in the framework of the CRIGE Normandy”.
The 2016 OTHO® HR 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 distributed by the IGN](https://geoservices.ign.fr/documentation/diffusion/telechargement-donnees-libres.html#ortho-hr-sous-licence-ouverte) under Open License are:
— in legal projection (Lambert 93 in metropolis and other specific projection for each DOM)
— JPEG2000 “lossless” format per slab of 1 km x 1 km
— compressed as a 7z archive (long to decompress for marginal compression gain, slabs already compressed)
In order to make it easier to use the tiles making up the orthophoto HR 2016, we offer a pyramid in GeoPackage OGC format in lambert 93. The Geopakage was produced from the GDAL library
“’
gdalbuildvrt D:\8_Ortho_2016\2016.vrt -addalpha -srcnodata 255 -hidenodata D:\8_Ortho_2016\data\*.jp2
gdalwarp D:\8_Ortho_2016\2016.vrt D:\8_Ortho_2016\2016.gpkg -t_srs EPSG:2154 -r cubic -of gpkg
gdaladdo -r cubic D:\8_Ortho_2016\2016.gpkg 4 16 64 256
“’
Resources
| Name |
Format |
Description |
Link |
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0 |
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https://www.data.gouv.fr/api/1/datasets/r/47b645c2-970f-4c1b-b089-786a52261ecb |
Tags
- ign
- photo-aerienne
- bd-ortho
- orthophoto
- calvados