LI Kunyu,WANG Xuemei,LI Rui,et al.The object-oriented land use classification incorporating auxiliary data sets[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2024,63(01):34-44.
LI Kunyu,WANG Xuemei,LI Rui,et al.The object-oriented land use classification incorporating auxiliary data sets[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2024,63(01):34-44. DOI: 10.13471/j.cnki.acta.snus.2023D031.
The object-oriented land use classification incorporating auxiliary data sets
Land use classification is critical to the management of land space. To improve the accuracy of land use classification
this study takes Bohu County as the research area
uses Sentinel-2A images to extract spectral features
and combines radar
spectral index
soil
and terrain features to construct six object-oriented land use classification models. We then use a simple non-iterative clustering algorithm and random forest algorithm to segment and classify the images and obtain the classification accuracy and feature importance ranking of the model. In the final step
we use the classification regression tree algorithm to verify the influence of the auxiliary dataset on the improvement of the classification accuracy. The results show that when using the SNIC algorithm to segment the images
with seed size 17 and compactness 0
the image segmentation effect in this study area is the best. The classification accuracy is the lowest when only spectral information is used
and adding any auxiliary dataset of radar
spectral index
soil
and terrain features can improve the classification accuracy of land use. Among those auxiliary datasets
the effect of terrain features on improving classification accuracy is more significant
and the classification accuracy reaches the highest when all auxiliary datasets are added
with OA=92.34% and Kappa coefficient=0.91. The classification validity is verified using the categorical regression tree algorithm
it shows that the classification effect based on the random forest algorithm is better than that of the categorical regression tree algorithm. The SNIC segmentation algorithm based on the remote sensing cloud platform is integrated into an auxiliary data set for object-oriented classification
which provide a reference for improving the accuracy of land use classification.
关键词
土地利用分类辅助数据集SNIC分割面向对象随机森林Sentinel-2A影像
Keywords
land use classificationauxiliary datasetsSNIC segmentationobject-orientedrandom forestsentinel-2A image
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