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Remote Sens. 2016, 8(12), 980; doi:10.3390/rs8120980

Validation of Regional-Scale Remote Sensing Products in China: From Site to Network

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School of Geography, Geomatics and Planning, Jiangsu Normal University, No. 101 Shanghai Road, Xuzhou 221116, China
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Key Laboratory of Remote Sensing of Gansu Province, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, No. 320 Donggang West Road, Lanzhou 730000, China
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Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing 100101, China
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University of Chinese Academy of Sciences, Beijing 100049, China
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State Key Laboratory of Resources & Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, No. 11A Datun Road, Beijing 100101, China
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School of Geographical Sciences, Southwest University, No. 2 Tiansheng Road, Chongqing 400715, China
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State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, No. 20A Datun Road, Beijing 100101, China
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State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, No. 19, Xinjiekouwai Street, Beijing 100875, China
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Author to whom correspondence should be addressed.
Academic Editors: Richard Müller and Prasad S. Thenkabail
Received: 20 September 2016 / Revised: 20 November 2016 / Accepted: 21 November 2016 / Published: 26 November 2016
View Full-Text   |   Download PDF [1812 KB, uploaded 29 November 2016]   |  

Abstract

Validation is mandatory to quantify the reliability of remote sensing products (RSPs). However, this process is not straightforward and usually presents formidable challenges in terms of both theory and real-world operations. In this context, a dedicated validation initiative was launched in China, and we identified a validation strategy (VS). This overall VS focuses on validating regional-scale RSPs with a systematic site-to-network concept, consisting of four main components: (1) general guidelines and technical specifications to guide users in validating various land RSPs, particularly aiming to further develop in situ sampling schemes and scaling approaches to acquire ground truth at the pixel scale over heterogeneous surfaces; (2) sound site-based validation activities, conducted through multi-scale, multi-platform, and multi-source observations to experimentally examine and improve the first component; (3) a national validation network to allow for comprehensive assessment of RSPs from site or regional scales to the national scale across various zones; and (4) an operational RSP evaluation system to implement operational validation applications. Research progress on the development of these four components is described in this paper. Some representative research results, with respect to the development of sampling methods and site-based validation activities, are also highlighted. The development of this VS improves our understanding of validation issues, especially to facilitate validating RSPs over heterogeneous land surfaces both at the pixel scale level and the product level. View Full-Text
Keywords: validation; remote sensing product; technical specification; sampling; ground truth; pixel scale; heterogeneous surface validation; remote sensing product; technical specification; sampling; ground truth; pixel scale; heterogeneous surface
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, S.; Li, X.; Ge, Y.; Jin, R.; Ma, M.; Liu, Q.; Wen, J.; Liu, S. Validation of Regional-Scale Remote Sensing Products in China: From Site to Network. Remote Sens. 2016, 8, 980.

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