Satellite & Aerial Imagery

USGS EarthExplorer: Search and download satellite imagery, aerial photos, and topographic maps.

USGS GloVis: USGS Global Visualization Viewer for browsing Landsat and other datasets. 

NASA Earthdata Search: NASA’s interface to discover and download Earth science data.

USGS Satellite Image Catalog: Catalog of satellite imagery types available through USGS.

USGS LandsatLook: Preview Landsat imagery with interactive map and JPEG format.

Climate Engine: Visualize and download climate and remote sensing data interactively. 

WELD: Landsat composites from USGS for long-term monitoring of land change.

NASA MODIS Home: Main MODIS site for sensor information and data access. 

NASA OceanColor: Global ocean color data including chlorophyll and water quality. 

NASA AppEEARS: Tool for accessing and extracting subsets of satellite data.