- Dernière mise à jour
- 3 juillet 2025
- Conditions d'utilisation
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- Organisation
- EnviDat: le portail de données environnementales
- Catégories
- Éducation, culture et sport
Description
The main datasets available are 4 nationwide Digital Surface Models (DSMs) and corresponding Vegetation Height Models (VHMs) with a spatial resolution of 1 m. The Vegetation Height Models are calculated by subtraction of a Digital Terrain Model (swissAlti3d version 2017, swisstopo) from the generated DSMs. DSMs were derived by image matching of scanned historical images (panchromatic 8-bit) acquired with a RC10 frame camera, in the context of the swisswide image acquisition campaigns of swisstopo. Nationwide products could be generated for the four epochs 1979-1985 / 1985-1991 / 1990-1998 / 1998-2006. Additional information about successful image matching vs. interpolation of pixels and about the year of image acquisition are available in the corresponding files (matched_area_xxxx_xxxx_binay.tif and meta_acquisition_year_xxxx_xxxx.json, respectively). To separate vegetation from non-vegetation areas a mask derived from a combination of information of the Topographic landscape model - TLM (swisstopo) and a NDVI layer was used and is supplied as "TLM_mask.tif" Due to the occurrence of unrealistic vegetation height values caused by the failure of the image matching process (mainly overexposed images and clouds or very steep rocky terrain), pixel values > 60 m were set to NoData and < 0 m to 0. All datasets are available in the Reference System LV95 (EPSG: 2056) LN02 (EPSG: 5728) and share the common extent definition (xmin ymin xmax ymax): 2480000 1070000 2840000 1300000
Ressources
- TXT readme.txt
- GeoTIFF 1998-2006 Vegetation Height Model
- GeoTIFF 1990-1998 Vegetation Height Model
- GeoTIFF 1985-1991 Vegetation Height Model
- GeoTIFF 1979-1985 Vegetation Height Model
Showcases
Informations complémentaires
- Identifier
- d16d27e5-b239-4909-b914-1b0b5337dab3@envidat
- Date de publication
- 31 mai 2024
- Date de modification
- 3 juillet 2025
- Conforme à
- -
- Editeur
- EnviDat
- Points de contact
- Langues
- Anglais
- Informations complémentaires
- -
- Landing page
- https://www.envidat.ch/#/metadata/historical-vegetation-height-model-nfi
- Documentation
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- Couverture temporelle
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- Couverture spatiale
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- Intervalle d'actualisation
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- Accès aux métadonnées
- API (JSON) Télécharger XML
