Covered Plant of Saint-Nazaire Agglo - year 2022

The vegetation cover is the tree, shrub and herbaceous heritage of the Nazairian agglomeration for: • Know the tree, shrub and herbaceous heritage • Have an encrypted inventory on a given date to be able to follow up • Distinguish green heritage according to state ownership • Observe the evolution of heritage • Manage, plan, prioritize [To view a map of the vegetation cover - click here](https://data.saintnazaireagglo.fr/map/couvert_vegetal/) [To find out more, click here and read the dataset sheet](https://data.saintnazaireagglo.fr/api/datasets/1.0/244400644_couvert_vegetal_sna_2022/attachments/a5_sna_fiche_donnees_couvert_vegetal_bdpage_pdf/) [Click here to download (OGC Geopackage - 905 MB)](https://cloud.saintnazaire.fr/f/4bc641572c0a4c2b8d86/)  [Detailed information](https://datacat.in.saintnazaireagglo.fr/srv/fre/catalog.search#/metadata/474ec426-0c62-43aa-8cb0-7759ae00882d) The vegetation cover (tree-shrub frame = canopy and green frame) was achieved by a hybrid approach of deep learning and photo-interpretation. The 2022 aerial views were used (RGB natural color and IRC Infra Red Color) as well as the 2020 LIDAR. Kermap carried out these treatments in 2023. The identification of the nomenclature classes was then carried out by a spatial analysis combining the surface area, width and shape of the polygons. The height of the retained vegetation of 5 m makes it possible to distinguish the canopy in tree layer and shrub layer. Polygons that are ‘linear’ or have ‘linear appendages’ with a width of 30 m are identified and isolated by the successive application of erosion-dilation morphology to the polygons and an analysis of the compactness of the objects. Statistics have been produced: \- General situation: rate and total area observed by municipality and plant category \- Distribution of vegetation according to the nature of the property (public and private), thanks to the RPG 2022 (Registre Parcellaire Général) allowing to dissociate public/private. Recommended scale of use: 1 / 2 000 – Minimum collection unit: 1 m2