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Information on the COG format can be found at:

In collaboration with the Amazon Web Service (AWS) Public Dataset Program, NASA has made the following datasets available in Cloud Optimized GeoTIFF (COG) format for the COVID-19 Space Apps Challenge.

Amazon Web Services (AWS) and NASA have a Space Act Agreement to explore best practices around discovery, access, and use of high-value NASA science datasets. Making analytics-optimized data stores available to the science community will minimize the need for data wrangling and preprocessing within the community, leading to a faster time to insight and quicker innovation. We are leveraging this Space Act Agreement to make these products freely available.

The datasets were validated by the respective science experts at NASA's Distributed Active Archive Centers (DAACs).

Available Datasets

OMI/Aura NO2 Cloud-Screened Tropospheric Column Global Gridded 0.25 degree x 0.25 degree in Cloud-Optimized GeoTIFF

Screenshot of OMI/Aura NO2 tropospheric column L3 data.

OMI/Aura NO2 Cloud-Screened Total and Tropospheric Column L3 Global Gridded 0.25 degree x 0.25 degree V3. Courtesy of Goddard Earth Sciences Data and Information Services Center (GES DISC).

NO2 tropospheric column density, screened for CloudFraction < 30% global daily composite at 0.25 degree resolution for the temporal range January 2004 to May 2020. Original OMI/Aura NO2 archive data in HDF5 has been processed into a Cloud-Optimized GeoTIFF (COG) format.

Documentation

Contact: binita.kc@nasa.gov

Resources on AWS

  • OMI NO2 S3 file listing
  • OMI NO2 in Cloud-Optimized GeoTIFF format
  • Amazon Resource Name (ARN): arn:aws:s3:::omi-no2-nasa
  • Region: us-west-2
  • Type: S3 Bucket

You can also access the data using AWS CLI: s3://omi-no2-nasa/

MODIS Terra and Aqua Vegetation Indices at Various Spatial and Temporal Resolutions in Cloud-Optimized GeoTIFF format

Screenshot of MOD13A1 data visualization over Brazil.

Terra MODIS NDVI data from the MOD13A1 product over part of Brazil, July 28 - August 12, 2018. Courtesy of Land Processes Distributed Active Archive Center (LP DAAC).

The dataset includes Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) from the following products:

  • MOD13A1.006, Terra MODIS, 500m, Multi-Day
  • MOD13A2.006, Terra MODIS, 1km, Multi-Day
  • MYD13A1.006, Aqua MODIS, 500m, Multi-Day
  • MYD13A2.006, Aqua MODIS, 1km, Multi-Day

Documentation

Contact: sadashiva.devadiga-1@nasa.gov

Resources on AWS

MODIS/Terra+Aqua MAIAC Land Aerosol Optical Depth Daily L2G 1 km SIN Grid in Cloud-Optimized GeoTIFF (COG)

Screenshot of MCD19a2v006 data visualization.

Combined MODIS Optical Depth 047 data from the MCD19A2 product over part of west Africa, June 3, 2018. Courtesy of Land Processes Distributed Active Archive Center (LP DAAC). 

0.47 μm and 0.55 μm Aerosol Optical Depth (AOD) over land in Cloud-Optimized GeoTIFF (COG) format, generated from the MCD19A2 Version 6 data product. MCD19A2 is a Moderate Resolution Imaging Spectroradiometer (MODIS) Terra and Aqua combined Multi-angle Implementation of Atmospheric Correction (MAIAC) Land Aerosol Optical Depth (AOD) gridded Level 2 product produced daily at 1 kilometer (km) pixel resolution (source: MCD19A2 v006).

Satellite measurements of aerosols, called aerosol optical depth, are based on the fact that the particles change the way the atmosphere reflects and absorbs visible and infrared light. An optical thickness of less than 0.1 (palest yellow) indicates a crystal clear sky with maximum visibility, whereas a value of 1 (reddish brown) indicates very hazy conditions.

MCD19A2 v006 Documentation

Contact: sudipta.sarkar@nasa.gov

Resources on AWS

  • MODIS AOD S3 file listing
  • MODIS Aerosol Optical Depth (AOD) in Cloud-Optimized GeoTIFF format
  • ARN: arn:aws:s3:::modis-aod-nasa
  • Region: us-west-2
  • Type: S3 Bucket

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