In this issue we focus on projects that build on our previous work, the insights we deliver and the real impact they have on policy and in the actual decision making process. There are two very different projects, one based in the Caribbean and the other much closer to home here in Wales.There is also a short piece on how we are tackling the GDPR (General Data Protection Regulation), something that we will all have to become familiar with over the next few months. View and download the PDF here.
We are looking for highly motivated mid-career ecologist, who is seeking to grow their track record, manage their own workload and develop their standing and business opportunities as a consultant ornithologist/ecologist. You will need to be passionate about the natural environment and sustainability with a view to problem solving and negotiating to get the best for biodiversity. Find out more.
There’s quite a lot that is new with our Data Services; what’s on offer, and how the data are licensed. You can sign up for a free account to download free Sentinel-1 and Sentinel-2 satellite imagery (and other, satellite-derived products) or sign up for a Premium account to do much more. You can access the data portal here.
Benefits of our Free account
- Download readily available imagery from the Sentinel-1 and Sentinel-2 satellites
- Access satellite-derived products that reveal information about our environment including habitats, soil, fire risk, agriculture, wetlands and forests.
Data available from Free accounts:
- Seasonal Sentinel-1 (radar) imagery:
- Summer 2016 image
- Autumn 2016 image
- Winter 2016 image
- Spring 2017 image
- Annual Sentinel-2 (optical) imagery and derived products:
- 2016 ‘True Colour’/Red Green Blue (RGB) image
- 2016 Normalised Difference Vegetation Index (NDVI) image
- 2016 Enhanced Vegetation Index (EVI) image
- 2016 Nitrogen Reflectance Index (NRI) image
- Optimised Soil Adjusted Vegetation Index (OSAVI) image
Benefits of our Premium account:
- Search our satellite image catalogue for the dates you need
- Upload or draw your own areas of interest
- Select the satellite-derived products you want (NDVI, EVI, NRI etc.)
- Download only the areas you need
- ‘Mask’ out cloud using our innovative cloud masking algorithm
What are the ‘satellite derived products?’
- ‘True Colour’ Image/Red Green Blue (RGB) – The colours in a ‘true colour’ image appear as they would to a human. Suitable for visualisation purposes and observing change.
- ‘Science Ready’ Image (Red Green Blue + NIR) – A multispectral image that provides information about the reflectance of blue, green, red and near-infrared light. Suitable for visualising changes in plant health, producing indices and classification.
- Normalised Difference Vegetation Index (NDVI) – A measure of vegetation productivity (measure of ‘greenness’). Bright areas correspond to healthy, productive vegetation. Bare ground and urban areas will appear dark.
- Enhanced Vegetation Index (EVI) – Similar to NDVI, EVI is used in areas of dense canopy where the large amounts of chlorophyll can affect the suitability of NDVI. EVI helps to correct for soil background signals and atmospheric influences.
- Optimised Soil Adjusted Vegetation Index (OSAVI) – In areas where vegetation is sparse and soil is visible, OSAVI can be used to assess the abundance and vigour of vegetation. It is similar to NDVI, however it compensates for the effects of soil reflectance.
- Plant Senescence Reflectance Index (PSRI) – An increase in PSRI indicates increased canopy stress, the onset of canopy senescence and plant fruit ripening. Applications include vegetation health monitoring, plant physiological stress detection plus crop production and yield analysis.
- Nitrogen Reflectance Index (NRI) – Predicts plant nitrogen status. Can be used to estimate plant parameters and yield potential.
- Modified Normalised Difference Water Index (MNDWI) – Using MNDWI is one of the most popular methods for water body mapping. It overcomes the shortcomings of NDWI by using shortwave infrared to replace near infra-red used in NDWI. In the last few decades, it has been widely applied to produce water body maps at different scales.
Our existing Sentinel-1 products are as follows:
- Backscatter – A measure of the strength of the radar signal (measured in units of Sigma 0). Band 1 (VV) shows surface scattering; a rougher surface or urban areas with lots of right-angled structures generates higher VV backscatter. Band 2 (VH) relates to volume scattering; randomly oriented volumes, such as forests, generate higher VH backscatter than flat surfaces such as bare soil.
- Backscatter with ratio band – The basic backscatter product with an additional ratio band. The ratio band helps visualise the product in an RGB composite, and also provides a measure of vegetation density. The ratio correlates well with biomass similar to optical indices such as NDVI NB: Backscatter products can also be produced on a decibel (dB) scale. This is useful for visualisation as you can see more detail in vegetation, but should be avoided for analytical purposes.
If you want to know more about interpreting our Sentinel-1 imagery check out our video here.
In this issue there is an update on our Data Services provision, another trip to the Caribbean this time to the island of Montserrat, ecosystem services assessment in Norfolk, a successful planning application for a hydro-electric scheme in Wales and the launch of our new ethics policy. We wish you all a successful 2018 and look forward to catching up with you soon. View and download the PDF here.
We have just published the Autumn 2017 edition of our Sphere Newsletter. In this issue there’s news of a recent project for Bristol Water where we used our SENCE toolkit to map ecosystem services to enhance water regulation and biodiversity. News too of our Data Services API – built on an open API standard it is now possible to directly access all the services we have on offer. We are spending more time in Latin America thanks to the EO4cultivar project and we attended our first Agricultural trade show in Colombia. You can download the newsletter from here.
The latest edition of our Company newsletter, ‘Sphere,’ has been published and you can download it from here.
In this issue of Sphere there’s news of two projects focusing on Ecosystem Services, plus an R&D project that uses our data processing expertise to monitor agricultural productivity. There’s an update of our Data Services Platform which now provides a ‘Premium’ option enabling subscribers to select precise areas of interest and the time of data capture. Sentinel-2 data will join Sentinel-1 data and be available later this year.
We have published the Spring 2017 edition of our newsletter which you can view and download here.
In the last issue of Sphere we reported our intention to deliver a data service based on Copernicus Sentinel data. Today you can try it for yourself and if you read on, you can find out more about our plans for the future. Elsewhere in this issue there’s news of new projects in South America, and Africa where Earth observation is very much to the fore. Back at home our Ecology Services Team has been busy with a planned hydropower project in Mid Wales.