Remote sensing

Canadian GeoConnections Discovery Portal

The Discovery Portal enables GIS users, developers and data suppliers to find, evaluate, access, visualize, and publish Canadian geospatial and geoscience data products and Web services. Some examples of geospatial and geoscience data accessible through the GeoConnections Discovery Portal include: air photos, topographic data, remote sensing images, tabular statistics, and thematic map layers. The majority of the data are available for download at no cost.

Great Lakes Information Network (GLIN)

Discover, publish, and acquire geospatial data for areas within the Great Lakes region. The GLIN has a portal for viewing and exploring the Great Lakes and associated data layers, a data portal through which GIS and geospatial data for the Great Lakes can be published and acquired, and a gallery of downloadable images depicting Great Lakes geophysical data. The majority of the data are available for download at no cost.

USGS LandsatLook Viewer

LandsatLook Viewer allows searching and downloading of LandsatLook Images. LandsatLook Images are full resolution .jpg files that are included as options when downloading Landsat data from EarthExplorer or GloVis. Images are useful for image selection and visual interpretation. The majority of the data are available for download at no cost. Click here for a list of data products.

Hazards Data Distribution System (HDDS)

The USGS Emergency Operations, in support of the Department of Homeland Security, provides these images for use in disaster preparations, rescue and relief operations, damage assessments, and reconstruction efforts. HDDS supplies satellite and aerial images for analysis of disaster areas before, during, and after a disaster.  Access disaster response imagery in predefined tiled downloads. The majority of the data are available for download at no cost.

Moderate Resolution Imaging Spectroradiometer (MODIS)

MODIS is an instrument aboard the Terra and Aqua satellites. Both satellites view the entire Earth's surface every 1 to 2 days acquiring data in 36 spectral bands at three spatial resolutions (250m, 500m, and 1,000m) describing features of the land, oceans and the atmosphere. The majority of the data are available for download at no cost. Click here for a list of data products.

USGS Land Remote Sensing Program

The Land Remote Sensing Program provides the Federal Government and the public with a primary source of remotely sensed data and applications. Products and data available include aerial photography, digitized maps, elevation products, land cover, and satellite imagery. The majority of the data are available for download at no cost except for higher resolution film scans.

Global Change Master Directory

The Global Change Master Directory is an extensive directory of descriptive and locational information about data sets and services relevant to global change research. The project mission is to assist researchers, policy makers, and the public in the discovery of and access to data, related services, and ancillary information (which includes descriptions of instruments and platforms) relevant to global change and Earth science research.  The majority of the data are available for download at no cost.

Reverb

NASA's Reverb is an interface to search, discover, and access EOS data products, and invoke available data services. Reverb searches against the ECHO metadata clearinghouse which facilitates all data discovery and order processing capabilities. The majority of the data are available for download at no cost. Note: Users are required to register for a NASA User Registration System (URS) account to download data.

USGS Data Pool

The Data Pool is the publicly available portion of the Land Processes Distributed Active Archive Center online holdings.It offers ASTER data covering the US and its territories and global MODIS data. It offers FTP access to selected data products. All data are available at no cost.