JNCC Sentinel-2 indices Analysis Ready Data (ARD) Normalised Difference Vegetation Index (NDVI)
Sentinel-Hub NDVI description:
NDVI is a simple, but effective index for quantifying green vegetation. It normalizes green leaf scattering in Near Infra-red wavelengths with chlorophyll absorption in red wavelengths.
The value range of the NDVI is -1 to 1. Negative values of NDVI (values approaching -1) correspond to water. Values close to zero (-0.1 to 0.1) generally correspond to barren areas of rock, sand, or snow. Low, positive values represent shrub and grassland (approximately 0.2 to 0.4), while high values indicate temperate and tropical rainforests (values approaching 1). It is a good proxy for live green vegetation.
NDVI = (NIR – Red) / (NIR + RED)
Sentinel-2 NDVI = (B8 - B4) / (B8 + B4)
These data have been created by the Joint Nature Conservation Committee (JNCC) as part of a Defra Natural Capital and Ecosystem Assessment (NCEA) project to produce a regional, and ultimately national, system for detecting a change in habitat conditions at a land parcel level. The first stage of the project is focused on Yorkshire, UK, and therefore the dataset includes granules and scenes covering Yorkshire and surrounding areas only. The dataset contains Normalised Difference Vegetation Index (NDVI) data derived from Defra and JNCC Sentinel-2 Analysis Ready Data.
NDVI files are generated for the following Sentinel-2 granules:
As the project continues, JNCC will expand the geographical coverage of this dataset and will provide continuous updates as ARD becomes available.
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|Previously used record identifiers:||
No related previous identifiers.
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).
A representative subset of data are manually checked to ensure the indices files align with the ARD files, the value ranges are as expected, and the data format is correct. Data are as given by the data provider, no quality control has been performed by the Centre for Environmental Data Analysis (CEDA).
These data are provided in Cloud Optimized GeoTIFF (COG) format.
|JNCC 'Simple ARD Service' user guide|
|Sentinel hub NDVI description|
|Sentinel 2 Multispectral Instrument (MSI)||Deployed on: Sentinel 2A|
|Sentinel 2 Multispectral Instrument (MSI)||Deployed on: Sentinel 2B|
Computation Element: 1
|Title||Computation for JNCC Sentinel-2 indices Analysis Ready Data (ARD) Normalised Difference Vegetation Index (NDVI)|
|Abstract||All index equations from Sentinel-hub custom scripts (links in Related Documents). Sentinel-2 surface reflectance products are obtained from Defra and JNCC Sentinel-2 ARD CEDA dataset. ARD granules are masked using the corresponding cloud and topographic shadow masks. NDVI index files are then generated in R 3.6.1 using the raster::calc function.|