Tea acreage estimation and condition assessment using satellite data in nilgiri district, tamilnadu

Sharma, Rajeev; Jayaraman, M.; Oza, Sandip R.; Ravindran, Aaditya; Maruthachalam, M; Parihar, J. S.

doi:10.1007/bf03016719

Cited by 4 publications

(1 citation statement)

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“…Tea production played an important role in the development of the Chinese agricultural economy [4], and China is now the world’s largest tea producer, with 2.79 million ha under cultivation in 2015, accounting for 61.7% of global tea plantation area [5,6]. Determining the spatial distribution and area of tea plantations in a timely and accurate manner is of great significance for analysing and regulating the industry, optimizing the regional distribution of tea production, and promoting its sustainable development [7]. This can also provide basic data for yield estimation, disease analysis, environmental effects, and other research interests.…”

Section: Introductionmentioning

confidence: 99%

An Improved Multi-temporal and Multi-feature Tea Plantation Identification Method Using Sentinel-2 Imagery

Zhu

Pan

Wang

et al. 2019

Sensors

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As tea is an important economic crop in many regions, efficient and accurate methods for remotely identifying tea plantations are essential for the implementation of sustainable tea practices and for periodic monitoring. In this study, we developed and tested a method for tea plantation identification based on multi-temporal Sentinel-2 images and a multi-feature Random Forest (RF) algorithm. We used phenological patterns of tea cultivation in China’s Shihe District (such as the multiple annual growing, harvest, and pruning stages) to extracted multi-temporal Sentinel-2 MSI bands, their derived first spectral derivative, NDVI and textures, and topographic features. We then assessed feature importance using RF analysis; the optimal combination of features was used as the input variable for RF classification to extract tea plantations in the study area. A comparison of our results with those achieved using the Support Vector Machine method and statistical data from local government departments showed that our method had a higher producer’s accuracy (96.57%) and user’s accuracy (96.02%). These results demonstrate that: (1) multi-temporal and multi-feature classification can improve the accuracy of tea plantation recognition, (2) RF classification feature importance analysis can effectively reduce feature dimensions and improve classification efficiency, and (3) the combination of multi-temporal Sentinel-2 images and the RF algorithm improves our ability to identify and monitor tea plantations.

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Section: Introductionmentioning

confidence: 99%