| DOI: | 10.1111/gcb.14492
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| Scopus记录号: | 2-s2.0-85058506815
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| 论文题名: | Estimating the global distribution of field size using crowdsourcing |
| 作者: | Lesiv M.; Laso Bayas J.C.; See L.; Duerauer M.; Dahlia D.; Durando N.; Hazarika R.; Kumar Sahariah P.; Vakolyuk M.; Blyshchyk V.; Bilous A.; Perez-Hoyos A.; Gengler S.; Prestele R.; Bilous S.; Akhtar I.U.H.; Singha K.; Choudhury S.B.; Chetri T.; Malek Ž.; Bungnamei K.; Saikia A.; Sahariah D.; Narzary W.; Danylo O.; Sturn T.; Karner M.; McCallum I.; Schepaschenko D.; Moltchanova E.; Fraisl D.; Moorthy I.; Fritz S.
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| 刊名: | Global Change Biology
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| ISSN: | 13541013
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| 出版年: | 2019
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| 卷: | 25, 期:1 | | 起始页码: | 174
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| 结束页码: | 186
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| 语种: | 英语
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| 英文关键词: | crowdsourcing
; environmental changes
; field size
; food security
; visual interpretation
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| Scopus关键词: | crowdsourcing
; environmental change
; estimation method
; mapping
; remote sensing
; satellite imagery
; spatial resolution
; agricultural land
; agriculture
; crowdsourcing
; satellite imagery
; statistics and numerical data
; Agriculture
; Crowdsourcing
; Farms
; Satellite Imagery
|
| 英文摘要: | There is an increasing evidence that smallholder farms contribute substantially to food production globally, yet spatially explicit data on agricultural field sizes are currently lacking. Automated field size delineation using remote sensing or the estimation of average farm size at subnational level using census data are two approaches that have been used. However, both have limitations, for example, automatic field size delineation using remote sensing has not yet been implemented at a global scale while the spatial resolution is very coarse when using census data. This paper demonstrates a unique approach to quantifying and mapping agricultural field size globally using crowdsourcing. A campaign was run in June 2017, where participants were asked to visually interpret very high resolution satellite imagery from Google Maps and Bing using the Geo-Wiki application. During the campaign, participants collected field size data for 130 K unique locations around the globe. Using this sample, we have produced the most accurate global field size map to date and estimated the percentage of different field sizes, ranging from very small to very large, in agricultural areas at global, continental, and national levels. The results show that smallholder farms occupy up to 40% of agricultural areas globally, which means that, potentially, there are many more smallholder farms in comparison with the two different current global estimates of 12% and 24%. The global field size map and the crowdsourced data set are openly available and can be used for integrated assessment modeling, comparative studies of agricultural dynamics across different contexts, for training and validation of remote sensing field size delineation, and potential contributions to the Sustainable Development Goal of Ending hunger, achieve food security and improved nutrition and promote sustainable agriculture. © 2018 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/117547
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Lesiv M.,Laso Bayas J.C.,See L.,et al. Estimating the global distribution of field size using crowdsourcing[J]. Global Change Biology,2019-01-01,25(1)
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