Mapping Maize Cropping Patterns in Dak Lak, Vietnam Through MODIS EVI Time Series
Land use maps specifying up-to-date acreage information on maize (<i>Zea mays</i> L.) cropping patterns are required by many stakeholders in Vietnam. Government statistics, however, lag behind by one year, and the official land use maps are only updated at 5-year intervals. The aim of th...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-04-01
|
| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/10/4/478 |
| _version_ | 1797571821767229440 |
|---|---|
| author | Ha Thi Thu Nguyen Loc Van Nguyen C.A.J.M (Kees) de Bie Ignacio A. Ciampitti Duc Anh Nguyen Minh Van Nguyen Luciana Nieto Rai Schwalbert Long Viet Nguyen |
| author_facet | Ha Thi Thu Nguyen Loc Van Nguyen C.A.J.M (Kees) de Bie Ignacio A. Ciampitti Duc Anh Nguyen Minh Van Nguyen Luciana Nieto Rai Schwalbert Long Viet Nguyen |
| author_sort | Ha Thi Thu Nguyen |
| collection | DOAJ |
| description | Land use maps specifying up-to-date acreage information on maize (<i>Zea mays</i> L.) cropping patterns are required by many stakeholders in Vietnam. Government statistics, however, lag behind by one year, and the official land use maps are only updated at 5-year intervals. The aim of this study was to apply the Savitzky–Golay algorithm to reconstruct noisy Enhanced Vegetation Index (EVI) time series (2003–2018) from Terra Moderate Resolution Imaging Spectroradiometer (MODIS) Vegetation Indices (MOD13Q1) to allow timely detection of changes in maize crop phenology, and then to employ a linear kernel Support Vector Machine (SVM) classifier on the reconstructed EVI time series to prepare the present-day maize cropping pattern map of Dak Lak province of Vietnam. The method was able to specify the spatial extent of areas cropped to maize with an overall map accuracy of 79% and could also differentiate the areas cropped to maize just once versus twice annually. The by-district mapped maize acreage shows a good agreement with the official governmental data, with a 0.93 correlation coefficient (<i>r</i>) and a root mean square deviation (<i>RMSD</i>) of 1624 ha. |
| first_indexed | 2024-03-10T20:46:05Z |
| format | Article |
| id | doaj.art-8ce8fc9c61e645a68a64f93619a9fbe6 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T20:46:05Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-8ce8fc9c61e645a68a64f93619a9fbe62023-11-19T20:19:05ZengMDPI AGAgronomy2073-43952020-04-0110447810.3390/agronomy10040478Mapping Maize Cropping Patterns in Dak Lak, Vietnam Through MODIS EVI Time SeriesHa Thi Thu Nguyen0Loc Van Nguyen1C.A.J.M (Kees) de Bie2Ignacio A. Ciampitti3Duc Anh Nguyen4Minh Van Nguyen5Luciana Nieto6Rai Schwalbert7Long Viet Nguyen8Center for Agricultural Research and Ecological Studies (CARES), Faculty of Environment, Vietnam National University of Agriculture, Trau Quy, Gia Lam, Hanoi 100000, VietnamFaculty of Agronomy, Vietnam National University of Agriculture, Trau Quy, Gia Lam, Hanoi 100000, VietnamDepartment of Natural Resources, Faculty of Geo-Information Science and Earth Observation, University of Twente, P.O. Box 217, 7500 AE Enschede, The NetherlandsDepartment of Agronomy, Kansas State University, 2004 Throckmorton PSC, 1712 Claflin Road, Manhattan, KS 66506-0110, USAFaculty of Agronomy, Vietnam National University of Agriculture, Trau Quy, Gia Lam, Hanoi 100000, VietnamFaculty of Agriculture and Forestry, Tay Nguyen University, 567 Le Duan, Buon Ma Thuot 630000, Đak Lak, VietnamDepartment of Agronomy, Kansas State University, 2004 Throckmorton PSC, 1712 Claflin Road, Manhattan, KS 66506-0110, USADepartment of Agronomy, Kansas State University, 2004 Throckmorton PSC, 1712 Claflin Road, Manhattan, KS 66506-0110, USAFaculty of Agronomy, Vietnam National University of Agriculture, Trau Quy, Gia Lam, Hanoi 100000, VietnamLand use maps specifying up-to-date acreage information on maize (<i>Zea mays</i> L.) cropping patterns are required by many stakeholders in Vietnam. Government statistics, however, lag behind by one year, and the official land use maps are only updated at 5-year intervals. The aim of this study was to apply the Savitzky–Golay algorithm to reconstruct noisy Enhanced Vegetation Index (EVI) time series (2003–2018) from Terra Moderate Resolution Imaging Spectroradiometer (MODIS) Vegetation Indices (MOD13Q1) to allow timely detection of changes in maize crop phenology, and then to employ a linear kernel Support Vector Machine (SVM) classifier on the reconstructed EVI time series to prepare the present-day maize cropping pattern map of Dak Lak province of Vietnam. The method was able to specify the spatial extent of areas cropped to maize with an overall map accuracy of 79% and could also differentiate the areas cropped to maize just once versus twice annually. The by-district mapped maize acreage shows a good agreement with the official governmental data, with a 0.93 correlation coefficient (<i>r</i>) and a root mean square deviation (<i>RMSD</i>) of 1624 ha.https://www.mdpi.com/2073-4395/10/4/478maizecropping patternMODIS MOD13Q1EVISavitzky-GolaySVM classifier |
| spellingShingle | Ha Thi Thu Nguyen Loc Van Nguyen C.A.J.M (Kees) de Bie Ignacio A. Ciampitti Duc Anh Nguyen Minh Van Nguyen Luciana Nieto Rai Schwalbert Long Viet Nguyen Mapping Maize Cropping Patterns in Dak Lak, Vietnam Through MODIS EVI Time Series Agronomy maize cropping pattern MODIS MOD13Q1 EVI Savitzky-Golay SVM classifier |
| title | Mapping Maize Cropping Patterns in Dak Lak, Vietnam Through MODIS EVI Time Series |
| title_full | Mapping Maize Cropping Patterns in Dak Lak, Vietnam Through MODIS EVI Time Series |
| title_fullStr | Mapping Maize Cropping Patterns in Dak Lak, Vietnam Through MODIS EVI Time Series |
| title_full_unstemmed | Mapping Maize Cropping Patterns in Dak Lak, Vietnam Through MODIS EVI Time Series |
| title_short | Mapping Maize Cropping Patterns in Dak Lak, Vietnam Through MODIS EVI Time Series |
| title_sort | mapping maize cropping patterns in dak lak vietnam through modis evi time series |
| topic | maize cropping pattern MODIS MOD13Q1 EVI Savitzky-Golay SVM classifier |
| url | https://www.mdpi.com/2073-4395/10/4/478 |
| work_keys_str_mv | AT hathithunguyen mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries AT locvannguyen mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries AT cajmkeesdebie mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries AT ignacioaciampitti mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries AT ducanhnguyen mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries AT minhvannguyen mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries AT luciananieto mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries AT raischwalbert mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries AT longvietnguyen mappingmaizecroppingpatternsindaklakvietnamthroughmodisevitimeseries |