IT Projects Development & ManagementSoftware Engineering ConsultancyGeographical Information Systems Expertise

IT Projects Development & Management

Software Engineering Consultancy

Geographical Information Systems Expertise

About Us

Quadratic is a Belgian service company active in IT and GIS (Geospatial). Our services cover the analysis, design, architecture, development, testing, documentation, productization and maintenance of software solutions.

In addition to the fixed price or time and material development activities for our clients, we are currently developing real-time monitoring and decision support tools for the agro-industrial and smart-farming sectors.

Our approach is clear: to solve real problems with solutions that work, based on appropriate technologies and respecting budgets, constraints and deadlines.

Here are some of our references and partners:


News

Quadratic recherche un Géomaticien Junior

Note du 04/06/2017 - Ce poste n'est plus vacant

Quadratic est une société de service belge active dans l’IT et le GIS (Geospatial). Nos prestations couvrent l’analyse, la conception, l’architecture, le développement, les tests, la documentation, la productisation ainsi que la maintenance de solutions logicielles.

Outre nos activités de développements en prix fixe ou régie pour nos clients, nous développons actuellement des outils de suivi et de prise de décision en temps réel pour les secteurs de l’agro-industrie et de l’agriculture de précision.

Afin de renforcer notre équipe et d’assurer notre croissance, nous recherchons actuellement un géomaticien.

job

Vos responsabilités

En tant que géomaticien junior, vous serez amené à 

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Quadratic recherche un Senior Java/GIS Consultant

Note du 04/06/2017 - Ce poste n'est plus vacant

Quadratic est une société de service belge active dans l’IT et le GIS (Geospatial). Nos prestations couvrent l’analyse, la conception, l’architecture, le développement, les tests, la documentation, la productisation ainsi que la maintenance de solutions logicielles.

Outre nos activités de développements en prix fixe ou régie pour nos clients, nous développons actuellement des outils de suivi et de prise de décision en temps réel pour les secteurs de l’agro-industrie et de l’agriculture de précision.

Afin de renforcer notre équipe et d’assurer notre croissance, nous recherchons actuellement un consultant Java ayant des connaissances en GIS/géomatique.

job

Vos responsabilités

En tant que consultant développeur senior, vous serez amené à travailler sur 

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Monitoring Crop Field Soil Moisture (NDWI) Using Sentinel-2 Temporal Series

Monitoring the soil moisture level of crop fields is one of the most important thing to do for having an optimal crop yield. The finer the spatial and temporal resolution, the better it is to take prompt actions when necessary.

The Copernicus Sentinel-2 programme makes it possible to have a full coverage of any place in Europe at least every 5 days in 13 different multispectral bands. Based on this, we studied the Normalized Difference Water Index (NDWI) over the period from May to September 2016 in the agricultural region in the Northern part of Liege, Belgium. The NDWI is defined by the following formula:

NDWI = ( NIR – SWIR ) / ( NIR + SWIR )

Where NIR is for the Near infrared band and SWIR for Short-Wave Infrared band. For Sentinel-2 data, these bands are respectively 8A and 11, which spatial resolution is of 20m. Values range from -1, very bad moiture level, to 1 very high moisture level.

The reflectance in the NIR band is influenced by the leaf internal structure and the dry matter of the crop. The SWIR, on the other hand, reflects the changes in both the vegetation water content and the spongy mesophyll structure. Other things being equal, a darker area in the SWIR area of the spectrum highlights a higher water content. The combination of both bands removes the variations induced by the leaf internal structure and the leaf dry matter content. The accuracy in the water content measurement is thus enhanced.

Our time series study gave us the following result for the 5-month period.

NDWI evolution from May to September 2016

NDWI evolution from May to September 2016

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