Disagreement Competition

The disagreement competition specially targeted those areas of greatest disagreement among the existing land cover products. Volunteers were ask to classify the pixels with the help of Google Earth and further validate the landcover. 

About the Competition

Owing to the large amount of disagreement among global land cover products, the creation of a global hybrid land cover product is seen as a major step towards improvement. In that regard, the goal of this competition was to focus on the areas of greatest disagreement among the existing products.

On pixels where all three land cover products are classified differently, we asked volunteers to classify the pixels with the help of Google Earth. Futhermore, we asked the volunteers to subclassify each pixel into a maximum of three land cover classes. As most pixels contain multiple land cover types, this will provide further information.


More details on the outputs of this competition will be provided in the near future. 

Combined Disagreement Map as provided on geo-wiki.org

Top 10 Validators

Rank Name Affiliation 
1Muhammad Athar Siraj National University of Sciences and Technology, Islamabad, Pakistan 
2Franziska Albrecht  IIASA, Laxenburg, Austria
 Anna Cipriani
Università di Modena e Reggio Emilia, Modena, Italy 
Mar’yana Vakolyuk 
IIASA & Centre for Aerospace Research of the Earth (CASRE) Kyiv, Ukraine 
Alfredo G. García National Institute of Agricultural Technology (INTA), Buenos Aires, Argentina 
Ahmed H. Rabia University of Naples Federico II, Naples, Italy 
Kuleswar Singha Gauhati University, Assam, India 
Abel Alan Macarini AgroParis Tech, Nancy, France 
Teja Kattenborn Albert-Ludwigs University, Freiburg, Germany 
10 Rubul Hazarika Gauhati University, Assam, India 

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Last edited: 25 January 2013


Steffen Fritz

EOCS Center Head and Deputy Program Director

Ecosystems Services and Management

T +43(0) 2236 807 353


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