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Categorisation of mango orchard age groups using Object-Based Image Analysis

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Abstract

Map** and characterisation of orchards are the foremost steps in the process of orchard monitoring. This study characterised mango orchards, an important cash crop of India, according to age groups using Object-Based Image Analysis (OBIA) and Sentinel-2 imagery. The performance of three vegetation indices (NDVI (Normalised Difference Vegetation Index), ReNDVI (Red Edge Normalised Difference Vegetation Index) and LSWI (Land Surface Water Index)) was evaluated individually to map the age groups of these orchards. Findings indicated that for level 2 classification (based on map** the orchard class as a whole), ReNDVI performed the best with an overall accuracy of 87%. Results of level 3 classification (based on age groups) indicate that LSWI gave the highest user and producer accuracy for medium (82.9%, 73.9%), old (65%, 74.2%) and young (51.8%, 76.3%) orchards. This study is a novel attempt to segregate various age groups (level 3 classification) using OBIA. The findings emphasise better separability at the mean class age groups with minimum overlap and intra-class mixing.

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Acknowledgements

This study was carried out under the JECAM (Joint Experiment on Crop Assessment and Monitoring) project. I would also like to thank Dr. Suresh Kumar, Dr. NR Patel and Director IIRS for supporting the project.

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Correspondence to Steena Stephen.

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Responsible Editor: Biswajeet Pradhan

Appendix

Appendix

Table 11

Table 11 Error matrix for ReNDVI level 2 classification

Table 12

Table 12 Error matrix for LSWI level 2 classification

Table 13

Table 13 Error matrix for NDVI level 2 classification

Table 14

Table 14 Error matrix for NDVI level 3 classification

Table 15

Table 15 Error matrix for ReNDVI level 3 classification

Table 16

Table 16 Error matrix for LSWI level 3 classification

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Stephen, S., Haldar, D. Categorisation of mango orchard age groups using Object-Based Image Analysis. Arab J Geosci 17, 62 (2024). https://doi.org/10.1007/s12517-024-11857-z

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  • DOI: https://doi.org/10.1007/s12517-024-11857-z

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