The dataset includes 20,689 aerial image on pixel size of 500*500. Here is the detail.

## Dataset structures

*   **ImageSets/Segmentation/train.txt** - the image ids for training set (you are ok to use)
*   **ImageSets/Segmentation/val.txt** - the image ids for validating set (you are ok to use and optional)
*   **ImageSets/Segmentation/test.txt** - the image ids for testing set (we will use them to evaluate your work)
*   **JPEGImages/*.png** - original aerial images on 500 over 500 pixels
*   **SegmentationClass/*.png** - The binary maps of coastal land/water. 0-land,1-water.