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Open AccessArticle

A Synergy Cropland of China by Fusing Multiple Existing Maps and Statistics

1
Key Laboratory of Agricultural Remote Sensing, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
2
International Food Policy Research Institute, Washington, DC 20006, USA
*
Author to whom correspondence should be addressed.
Sensors 2017, 17(7), 1613; https://doi.org/10.3390/s17071613
Received: 10 May 2017 / Revised: 24 June 2017 / Accepted: 3 July 2017 / Published: 12 July 2017
(This article belongs to the Special Issue Sensors and Smart Sensing of Agricultural Land Systems)
Accurate information on cropland extent is critical for scientific research and resource management. Several cropland products from remotely sensed datasets are available. Nevertheless, significant inconsistency exists among these products and the cropland areas estimated from these products differ considerably from statistics. In this study, we propose a hierarchical optimization synergy approach (HOSA) to develop a hybrid cropland map of China, circa 2010, by fusing five existing cropland products, i.e., GlobeLand30, Climate Change Initiative Land Cover (CCI-LC), GlobCover 2009, MODIS Collection 5 (MODIS C5), and MODIS Cropland, and sub-national statistics of cropland area. HOSA simplifies the widely used method of score assignment into two steps, including determination of optimal agreement level and identification of the best product combination. The accuracy assessment indicates that the synergy map has higher accuracy of spatial locations and better consistency with statistics than the five existing datasets individually. This suggests that the synergy approach can improve the accuracy of cropland mapping and enhance consistency with statistics. View Full-Text
Keywords: synergy map; cropland mapping; data fusion; statistics; agreement synergy map; cropland mapping; data fusion; statistics; agreement
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MDPI and ACS Style

Lu, M.; Wu, W.; You, L.; Chen, D.; Zhang, L.; Yang, P.; Tang, H. A Synergy Cropland of China by Fusing Multiple Existing Maps and Statistics. Sensors 2017, 17, 1613.

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