“SENTINEL-2 FOR AGRICULTURE” OVER MULTIPLE SITES

Bellemans N., Bontemps S., Arias M.,, Cara C., Dedieu G., Guzzonato E., Hagolle O., Inglada J., Morin D., Rabaute T., Savinaud M., Udroiu

C., Valero S., Koetz B., Defourny P.

and 12 benchmarking & demonstration site partners

11-12 October – 2016 JECAM Science Meeting – Kiev, Ukraine

• EO response to operational agricultural applications: – Emerging collaborative initiatives endorsed by G20 in the context of GEO

(AMIS, GEOGLAM)

– JECAM initiative opening the door to move from local experiments to global solutions

– CEOS support to global agriculture users requirements

– US and Chinese efforts on 30-m global croplands mapping

– Sentinel-2 mission to finally reach agriculture expectations (jointly with Landsat-8 and Sentinel-1)

Unique momentum for satellite

remote sensing in agriculture

Multispectral High Resolution Optical Imager

• Launch: Sentinel-2a in orbit since June 23rd 2015

Sentinel-2b : Q1 2017

• 13 bands (VIS, NIR & SWIR)

• 290 km swath at 10, 20 and 60 m

•Systematic acq. of all land and coasts

•5 days repeat cycle with 2 satellites

•7 years design lifetime (max. 12 yrs)

290 km

Sentinel-2 Swath & resolution 10 m for field scale mapping

10 meters resolution

Sentinel-2 for Agriculture project : User-driven approach to define the requirements

Consortium Champion Users + sites managers

Support & data provider

Survey filed up by 42 institutions

1st User Consultation organized by ESA in 2012

2nd User Consultation through surveys in 2014

1st Sen2-Agri Users Workshop – FAO May 2014

2nd Sen2-Agri Users Workshop – EU Nov. 2015

EARLY AREA INDICATOR

EARLY AREA INDICATOR

Binary map identifying annually cultivated land at 10m updated every month

Crop type map at 10 m for the main regional

crops including irrigated/rainfed

discrimination

Vegetation status map at 20 m delivered every

week (NDVI, LAI, pheno index)

Monthly cloud free surface reflectance composite at 10-20 m

System to deliver 4 Sen2-Agri products

in line with the GEOGLAM core products

3-phase approach

Users requirements & methods

development 2014

System development and EO products

2015

Demonstration & Validation 2016-2017

User Requirements Products specification Methods development

12 sites globally distributed

12 test sites, relying on JECAM network, spread over the world, which represent more than 17 major crop types

4 scientific papers published

Benchmarking to select the best

algorithms for each product

Phase 1

Phase 1- Users req. and methods development

2014

Phase 2 - System development

and EO products 2015

Phase 3 – Demonstration

& Validation 2016-2017

User Requirements

Products specification

Methods development

4 agriculture products

Open source system

Prototypes & validation

based on SPOT 4/5

Take 5 & Landsat-8

12 sites globally distributed

Phase 2 Sen2-Agri system development

and test from SPOT & Landsat-8 data

A open source system designed to run in an automated/offline mode and deliver agricultural products as the satellite images are ingested

Sen2-Agri system design

Phase 1- Users req. and methods development

2014

Phase 2 - System development

and EO products 2015

User Requirements

Products specification

Methods development

4 agriculture products

Open source system

Prototypes & validation

based on SPOT 4/5

Take 5 & Landsat-8

12 sites globally distributed

Phase 3 Sen2-Agri demonstration & Validation

Demonstration & Validation 2016-2017

National use cases Local use cases Capacity building Training activities

Fitness-to-use assessment

System qualification

To demonstrate the Sen2-Agri system and NRT products using Sentinel-2a & Landsat 8 at national scale with in situ system implementation

Demonstration phase : 3 national sites

Ukraine (SRI) South Africa (ARC) Mali (ICRISAT & IER)

Demonstration phase : 8 local sites

+ Bangladesh & Obregon (Mexico) (CIMMYT)

To demonstrate NRT products using Sentinel-2 & Landsat 8 at local scale

(~ 300 x 300 km)

Demonstration production status on the Sen2Agri production server

Site Season Automatic Download

L2A Atm Corr

L3A Composite (/month)

L3B LAI (/10 days)

L4A IS data Cropland

(/month from mid-season)

L4A no IS data Cropland

(/month from mid-season)

L4B Croptype

(2x/season)

Ukraine April - Oct 2016 NRT (S2 & L8) NRT (S2 & L8) In progress Until July

In progress Until July

NRT September

TBS NRT September

Mali June – Nov 2016 NRT NRT In progress Until July

In progress Until July

TBS TBS TBS

South Africa Oct 2016 – April

2017 Season not started yet

/ / / / / /

China June – Oct 2016 NRT NRT NRT

Until August

In progress Until June

TBS TBS TBS

Sudan July – Nov 2016 NRT NRT NRT

Until August

NRT Until October

TBS NRT

September TBS

France Feb – Nov 2016 NRT NRT In progress Until June

In progress Until July

TBS TBS TBS

Morocco Jan – July 2016 NRT NRT TBS TBS TBS TBS TBS

Madagascar Oct 2016 – April

2017 Season not started yet

/ / / / / /

*TBS : to be started

Parallel processing at national site manager premises.

First nationwide cloud free composite at 10m

resolution from Sentinel-2

1st of July composite

Overall accuracy: 0,96

Non cropland

Cropland

F-score cropland: 0,97

First nationwide crop type map at 10m

resolution from Sentinel-2

Train set – 5536 parcels/samples

1st system validation:

Fully independent validation still to be performed

Overall accuracy = 0,81

First nationwide crop type map at 10m

resolution from Sentinel-2

1st system validation:

France & Sudan cloud free composite

France – Midi-Pyrénées Sudan – White Nile / South Sudan

Amount of downloaded product (L1C Sentinel-2 and L1T Landsat 8)

For the system initialization (multi-temporal atmospheric correction)

S2: 63 products, 226 GB

L8: 327 products, 621 GB

For the growing season until today

S2: 427 products – 1.341TB

L8: 623 products – 1.2TB

Amount of L2A generated

For the system initialization

S2: 63 products, 756 GB (2 months)

L8: 146 products, 205 GB (3 months)

For the growing season until today

S2: 427 products – 5.33 TB

L8 : 554 products – 775 GB

High level figures :

Ukraine national demonstration

• For Atmospheric correction: Around 30 minutes per tile

• For Cloud free composite: 8 days for a product with S2 and L8 using a 50-day

moving window (~800Giga of data combined)

• For LAI: Approx. 3 minutes/ tile

• For Cropland mask: About 3 days for the raw crop mask, about 5 days for post-

filtering step

• For Croptype map: About 8 days

National hardware server : 2 x Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz (20 cores

total, 40 threads), 128 GB RAM (26 TB disk space)

System performances over national sites

Use cases objectives:

• Evaluate the overall performance of the system in real conditions

• Get feedback from the users

• Assess the level of support that further deployment of the system would require

• Get results and materials useful for the promotion of project’s results

Going from EO products to information

Ukraine France, Midi-Pyrénées

Morocco Madagascar Sudan/South-Sudan

Main interest Winter wheat crop production estimation

Real time water management for irrigation

- Tracking crop development of wheat and sugar beet, - Optimization of water allocation for irrigation

Food security: main crop acreage and conditions

Create reliable and up-to-date agricultural land cover database and an area frame for sampling in Agricultural Estimates

Information to retrieve from the Sen2Agri products

- Area of winter wheat - Indicator of the development stage and LAI of winter wheat - Crop type - NDVI - LAI

Maize map and growth stage for irrigation performances - Crop type - NDVI - LAI

- The area of wheat and sugar beet fields - NDVI an indicator of the crop development

Cropland, rice area, diversity of crops, rice growth anomalies -Crop mask -Crop type -NDVI -LAI

Area of main crops Indicator of the development stage -Crop type -NDVI

Season 2016 : area indicator per oblast

for the 5 main crops

18/02/2016

18/04/2016

28/04/2016

17/06/2016

17/07/2016

09/08/2016

LAI series over cropland

18/02/2016

18/04/2016

28/04/2016

17/06/2016

17/07/2016

09/08/2016

LAI series over winter wheat

Capacity Building - Hands-on Training Nov.15 at UCLouvain May 12-14 at LPS-Prague

User documentation

Product description sheets and the Product data structure summary

• Launch of the NRT production over South Africa and Madagascar where the season is starting

• Open system transferred to the sites

• Importance of an independent validation dataset to perform strong and fully independent product validation

• Accompany the sites in their use case development with local needs and local end-users

Next steps

Demonstration : to be completed by Spring 2017

to release a qualified Sen2-Agri system

Release of a qualified Sen2Agri system as open source code validated, fully documented and downloadable for all

http://www.esa-sen2agri.org/

Thank you for your attention

…and let’s learn from the diversity of agrosystems

http://www.esa-sen2agri.org/