Figure 1. Study area in Sejong city (top) and K3A image (a) Oct 28, 2015 (b) July 7, 2018
Figure 2. Flowchart of ROI extraction
Figure 3. An example of ROI extraction from Seamless digital map (a) 2015 Land cover map in Sejong (b) ROI with 100m x 100m grid applied.
Figure 4. Comparison of seamless digital map from 2013 to 2017 and unchanged areas.
Figure 5. Result of ROI extraction based on spatial information and ground truth points for accuracy verification.
Figure 6. Ground truth points appeared in Table 2.
Table 1. Data source and list of spatial information for ROI extraction
Table 2. Confusion matrix between ROI ground truth points during 2013-2015 and 2015 K3A image (OA=Overall accuracy)
Table 3. Confusion matrix between ROI ground truth points during 2015-2017 and 2018 K3A image (OA=Overall accuracy)
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