Abroad: Quick Birds (American fast bird, commercial, with the highest resolution of 0.6m), SPOT (with the spatial resolution of 2.5m in super mode) in France, Sentinel (an extremely high-quality data source, famous for its high resolution and free data, Sentinel2 has 12 band and excellent spectral resolution) in the European Space Agency. The spatial resolution of Landsat8 OLI panchromatic band can reach 15m, and it is a good data source for hyperspectral images (Landsat series is epic satellite group). The radar data of ALOS and ALOS PALSAR have good ground resolution.
There are many more, right? It should be,