Legacy soil data have been produced over 70 years in nearly all countries of the world. Unfortunately, data, information and knowledge are still currently fragmented and at risk of getting lost if they remain in a paper format. To process this legacy data into consistent, spatially explicit and continuous global soil information, data are being rescued and compiled into databases. Thousands of soil survey reports and maps have been scanned and made available online. The soil profile data reported by these data sources have been captured and compiled into databases. The total number of soil profiles rescued in the selected countries is about 800,000. Currently, data for 117, 000 profiles are compiled and harmonized according to GlobalSoilMap specifications in a world level database (WoSIS). The results presented at the country level are likely to be an underestimate. The majority of soil data is still not rescued and this effort should be pursued. The data have been used to produce soil property maps. We discuss the pro and cons of top-down and bottom-up approaches to produce such maps and we stress their complementarity. We give examples of success stories. The first global soil property maps using rescued data were produced by a top-down approach and were released at a limited resolution of 1km in 2014, followed by an update at a resolution of 250m in 2017. By the end of 2020, we aim to deliver the first worldwide product that fully meets the GlobalSoilMap specifications.

Agricultural Institute of Slovenia Ljubljana Slovenia

Agriculture and Agri Food Canada Ottawa Canada

Alterra Wageningen UR 6700 AA Wageningen The Netherlands

ARC Institute for Soil Climate and Water Pretoria South Africa

Biogeochemistry and Earth System Modelling Sciences de la Terre et de l'Environnement Universite Libre de Bruxelles Bruxelles Belgium

Cranfield University Soils and Agrifood Institute NSRI United Kingdc

CSIRO Australia

Department of Agricultural Environment National Academy of Agricultural Science Suwon 441 707 Korea

Department of Agroecology Faculty of science and technology Aarhus University Tjele Denmark

Dokutchaev Soil Science Institute Moscow Russia

Embrapa Solos Rio de janeiro Brazil

Eurasian Center for Food Security Lomonosov Moscow State University Moscow Russia

European Commission DG JRC Via E Fermi 2749 21027 Ispra Italy

Faculty of Agriculture Deptartment of Soil Science Zagreb Croatia

Faculty of Agrobiology Czech University of Life Sciences Prague Czech Republic

Indonesian Center for Agricultural Land Resource Research and Development Bogor West Javal Indonesia

INRA InfoSol Unit 45075 Orleans France

INRA IRD Supagro UMR Lisah Montpellier France

INRA Rabat Morocco

Institute for Agro Environmental Sciences NARO Tsukuba Ibaraki Japan

Institute of Soils INTA Buenos Aires Argentina

Instituto Nacional de Investigagao Agraria e Veterinaria Laboratorio de Solos de Oeiras Oeiras Portugal

International Center for Tropical Agriculture Headquarters and Regional Office for Latin America and the Caribbean Cali Colombia

International Institute of Tropical Agriculture Yaounde Cameroon

ISRIC World Soil Information PO Box 353 6700 AJ Wageningen The Netherlands

Land and Soil Protection Service Flemish Government Brussels Belgium

Land Development Department Land Development Department Ladyao Chatuchak Bangkok Thailand

Landcare research Manaaki Whenua New Zealand

Latvia Agricultural University Jelgava Latvia

Luxembourg Institute of Science and Technology Belvaux Grand Duchy of Luxembourg

MTT Plant Production Research Soil and Plant Nutrition Jokioinen Finland

NABODAT Agroscope Institut fur Nachhaltigkeitswissenschaft INH Zurich Switzerland

Nat Resources Canada Canadian Forest Serv Ste Foy Quebec City Canada

National Bureau of Soil Survey and Land Use Planning Nagpur Maharashtra India

National Institute of Statistics and Geography INEGI Aguascalientes Mexico

National Research and Development Institute for Soil Science Agro chemistry and Environment Bucharest Romania

National Scientific Center Institute for Soil Science and Agrochemistry Research Kharkiv Ukraine

People's Friendship University of Russia Moscow Russia

Research Institute for Soil Science and Agricultural Chemistry of the Hungarian Academy of Sciences Budapest Hungary

Retired US department of Agriculture Natural Resources Conservation Services Lincoln Nebraska USA

Sistema de Informacion Geografica Direccion General de Recursos Naturales Ministerio de Ganaderia Agricultura y Pesca Montevideo Uruguay

Soil genesis and classification department Soil and water research institute Karaj 1 R Iran

Soil Science and Conservation Research Institute Gagarinova 10 Bratislava Slovakia

Soil Science Institute of Athens NAGREF Athens Greece

State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing China

The James Hutton Institute Craigiebuckler Aberde and UK

University of Miskolc geography Institute Miskolc Egyetemvaros Hungary

University of Sydney Sydney Australia

University of Wisconsin Department of Soil Science Madison USA

US department of Agriculture Natural Resources Conservation Services Lincoln Nebraska USA

West Virginia University West Virginia USA

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