The images of iSAID is the same as the DOTA-v1.0 dataset, which are manily collected from the Google Earth, some are taken by satellite JL-1, the others are taken by satellite GF-2 of the China Centre for Resources Satellite Data and Application.
All images and their associated annotations in iSAID can be used for academic purposes only, but any commercial use is prohibited.
The object categories in iSAID include: plane, ship, storage tank, baseball diamond, tennis court, basketball court, ground track field, harbor, bridge, large vehicle, small vehicle, helicopter, roundabout, soccer ball field and swimming pool.
The iSAID uses pixel-level annotations. Each pixel represents a particular class. The annotation follows the format of MS COCO.
The Development kit provide the following function:
Dota is a large-scale dataset for object detection in aerial images.
You can download iSAID from either Baidu Drive or Google Drive, according to your network connections.