The Suitability of PlanetScope Imagery for Mapping Rubber Plantations
Quickly and accurately understanding the spatial distribution of regional rubber resources is of great practical significance. Using the unique phenological characteristics of rubber trees derived from remotely sensed data is a common effective method for monitoring rubber trees. However, due to the...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/5/1061 |
| _version_ | 1797473930926096384 |
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| author | Bei Cui Wenjiang Huang Huichun Ye Quanxi Chen |
| author_facet | Bei Cui Wenjiang Huang Huichun Ye Quanxi Chen |
| author_sort | Bei Cui |
| collection | DOAJ |
| description | Quickly and accurately understanding the spatial distribution of regional rubber resources is of great practical significance. Using the unique phenological characteristics of rubber trees derived from remotely sensed data is a common effective method for monitoring rubber trees. However, due to the lack of high-quality images available during the key phenological period, it is still very difficult to apply this method in practical applications. PlanetScope data with high temporal (daily) resolution have great advantages in acquiring high-quality images, but these images have not been previously used to monitor rubber plantations. In this paper, multitemporal PlanetScope images were used as data sources, and the spectral features, index features, first principal components, and textural features of the images were comprehensively utilized. Four classification methods, including a pixel-based random forest (RF) approach, pixel-based support vector machine (SVM) approach, object-oriented RF approach and object-oriented SVM approach, were utilized to discuss the feasibility of using PlanetScope data to monitor rubber forests. The results showed that the optimal time window for monitoring rubber forests in the study area spanned from the 49th day to the 65th day of 2019 according to the MODIS-NDVI analysis. The contribution rate of the difference in the modified simple ratio (dMSR) feature was largest among all considered features for all pixel-based and object-oriented methods. The object-oriented RF/SVM classification method achieved the best classification results with an overall accuracy of 93.87% and a Kappa index of agreement (KIA) of 0.92. The highest producer’s accuracy and user’s accuracy obtained with this method were 95.18% for rubber plantations. The results of this study show that it is feasible to use PlanetScope data to perform rubber monitoring, thus effectively solving the problem of missing images in the optimal rubber monitoring period; additionally, this method can be extended to other real-life applications. |
| first_indexed | 2024-03-09T20:24:07Z |
| format | Article |
| id | doaj.art-3d8ca8db32744994b32d238fc5086ba1 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T20:24:07Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-3d8ca8db32744994b32d238fc5086ba12023-11-23T23:40:47ZengMDPI AGRemote Sensing2072-42922022-02-01145106110.3390/rs14051061The Suitability of PlanetScope Imagery for Mapping Rubber PlantationsBei Cui0Wenjiang Huang1Huichun Ye2Quanxi Chen3Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaAerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaAerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaAerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaQuickly and accurately understanding the spatial distribution of regional rubber resources is of great practical significance. Using the unique phenological characteristics of rubber trees derived from remotely sensed data is a common effective method for monitoring rubber trees. However, due to the lack of high-quality images available during the key phenological period, it is still very difficult to apply this method in practical applications. PlanetScope data with high temporal (daily) resolution have great advantages in acquiring high-quality images, but these images have not been previously used to monitor rubber plantations. In this paper, multitemporal PlanetScope images were used as data sources, and the spectral features, index features, first principal components, and textural features of the images were comprehensively utilized. Four classification methods, including a pixel-based random forest (RF) approach, pixel-based support vector machine (SVM) approach, object-oriented RF approach and object-oriented SVM approach, were utilized to discuss the feasibility of using PlanetScope data to monitor rubber forests. The results showed that the optimal time window for monitoring rubber forests in the study area spanned from the 49th day to the 65th day of 2019 according to the MODIS-NDVI analysis. The contribution rate of the difference in the modified simple ratio (dMSR) feature was largest among all considered features for all pixel-based and object-oriented methods. The object-oriented RF/SVM classification method achieved the best classification results with an overall accuracy of 93.87% and a Kappa index of agreement (KIA) of 0.92. The highest producer’s accuracy and user’s accuracy obtained with this method were 95.18% for rubber plantations. The results of this study show that it is feasible to use PlanetScope data to perform rubber monitoring, thus effectively solving the problem of missing images in the optimal rubber monitoring period; additionally, this method can be extended to other real-life applications.https://www.mdpi.com/2072-4292/14/5/1061rubberobject-basedpixel-basedrandom forest approachsupport vector machine approachPlanetScope images |
| spellingShingle | Bei Cui Wenjiang Huang Huichun Ye Quanxi Chen The Suitability of PlanetScope Imagery for Mapping Rubber Plantations Remote Sensing rubber object-based pixel-based random forest approach support vector machine approach PlanetScope images |
| title | The Suitability of PlanetScope Imagery for Mapping Rubber Plantations |
| title_full | The Suitability of PlanetScope Imagery for Mapping Rubber Plantations |
| title_fullStr | The Suitability of PlanetScope Imagery for Mapping Rubber Plantations |
| title_full_unstemmed | The Suitability of PlanetScope Imagery for Mapping Rubber Plantations |
| title_short | The Suitability of PlanetScope Imagery for Mapping Rubber Plantations |
| title_sort | suitability of planetscope imagery for mapping rubber plantations |
| topic | rubber object-based pixel-based random forest approach support vector machine approach PlanetScope images |
| url | https://www.mdpi.com/2072-4292/14/5/1061 |
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