GLAM—Global Agricultural Monitoring

A collaboration between NASA/GSFC, USDA/FAS, and UMD Department of Geography
GLAM brochure cover — view enlarged image.

Project Background Mission and Goals

Project Components

GLAM Contact Information

GLAM Links

The Global Agriculture Monitoring brochure in PDF format.

Project Background Mission and Goals

Project Background NASA/UDSA MOU

The U.S. Department of Agriculture (USDA) and the National Aeronautics and Space Administration (NASA) recently signed a Memorandum of Understanding (MOU) to strengthen future collaboration. In support of this collaboration, NASA and the USDA Foreign Agricultural Service (FAS) jointly funded a new project to assimilate NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) data and products into an existing decision support system (DSS) operated by the International Production Assessment Division (IPAD) of FAS. Building on NASA's investment in the MODIS Science Team, the project is implementing a user-friendly system that will allow for the integration and analysis of MODIS data products in IPAD's DSS.

FAS Mission & Tasks

FAS promotes the security and stability of U.S. food supply, improves foreign market access for U.S. agricultural products, reports on world food security, and advises the U.S. government on international food aid requirements.

FAS bears the primary responsibility for USDA's overseas activities: market development, international trade agreements and negotiations, and the collection and analysis of statistics and market information. It also administers USDA's export credit guarantee and food aid programs, and helps increase income and food availability in developing nations by mobilizing expertise for agriculturally led economic growth.

IPAD's Scope

The FAS, through IPAD, provides agricultural information for global food security. It produces objective, timely and regular assessments of global agricultural production outlook and the conditions affecting food security. IPAD is responsible for global crop condition assessments and estimates of production and yield of grains, oilseeds, and cotton. IPAD assessments are an integral component of the monthly crop assessments issued by USDA's World Agricultural Outlook Board - a primary source for agricultural information worldwide.

The Application of NASA EOS MODIS Data to FAS
Agricultural Assessment and Forecasting

To meet its objectives, FAS/IPAD uses satellite data and data products to monitor agriculture worldwide and to locate and keep track of natural disasters such as short and long term droughts, floods and persistent snow cover which impair agricultural productivity. FAS is the largest user of satellite imagery in the non-military sector of the U.S. government. For the last 20 years FAS has used a combination of Landsat and NOAA-AVHRR satellite data to monitor crop condition and report on episodic events.

FAS is upgrading and enhancing the satellite component of its IPAD decision support system through an information delivery system for MODIS data and derived products. NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) on board two platforms of the Earth Observing System (EOS), was designed in part to monitor subtle vegetation responses to stress, vegetation production and land cover with regional-to-global coverage. Hence, integration of MODIS data and derived products into the IPAD FAS DSS provides FAS with better characterization of land surface conditions at the regional scale and enables monitoring of changes in the key agricultural areas of FAS focus regions in a more timely fashion and at a higher resolution than previously possible with NOAA-AVHRR data.

MODIS: An Operational Prototype

Although MODIS is a NASA experimental mission, the instrument's capabilities will be extended by the launch of the Visible Infrared Imager Radiometer Suite (VIIRS) in 2008, part of the National Polar Orbiting Environmental Satellite System (NPOESS), which will become fully operational in 2009. Thus the methods and system developed through this research project can be transitioned into a fully operational domain.

Project Components

  • Delivery and integration of MODIS Rapid Response data into the FAS monitoring system to facilitate improved monitoring of the impact of climate hazards, such as drought, large scale flooding, and snow storms, on agricultural production.
  • Development and delivery of a long term database of MODIS composite Vegetation Index (VI) time series including analysis tools and a graphic user interface that provides mosaicking, reprojection capabilities, and easy access to the moderate resolution image archive.
  • Establishment of the relationship between MODIS VI data and the long-term archives from the AVHRR and SPOT-VEGETATION used by FAS/IPAD.
  • Development of enhanced MODIS cropland products by including best available global croplan masks and globalcrop masks by crop type.
MODIS Rapid Response

The MODIS Rapid Response (RR) system provides rapid access to MODIS data collected twice daily from the Terra satellite in the morning (10:30am) and the Aqua satellite in the afternoon (2:30pm).

The RR system provides FAS analysts with access to georeferenced, calibrated, mosaicked daily global MODIS imagery for FAS regions of interest within 2-4 hours of satellite acquisition. RR data are available to FAS analysts at spatial resolutions of 250m, 500m and 1km in different band combinations.

MODIS RR interface — view enlarged image.

Such rapidly accessible data allows the FAS analysts to evaluate, and asses, in near real time, the effect of disaster events on crops.

Long Term Database of MODIS Composite Vegetation Index Time Series

In monitoring crop conditions for a specific region, remotely sensed vegetation index data are used to track the evolution of the growing season compared to reference long-term mean conditions. A global normalized difference vegetation index (NDVI) is produced from MODIS data, and is referred to as the "continuity index" similar to the existing archive of NOAA-AVHRR derived NDVI.

A global NDVI time-series database, with a spatial resolution of 250 meters has been assembled using a 16-day compositing period, allowing for interannual comparisons of growing season dynamics. This MODIS NDVI dataset is automatically reprojected and mosaicked to suit the FAS regions of interest.

Kenyan drought MODIS time series — view enlarged image.

The time-series data are accessible to FAS analysts through a powerful web interface and analysis tool. From this stand-alone interface the analysts can query these data by pre-defined sub-regions, by interactive regional subsetting, and by implementing crop/water masks to:
- plot time-series graphs over the crop growing seasons to quickly assess crop conditions and anomalies.
- monitor current conditions.
- view spatially, NDVI anomalies comparing current conditions to previous year, or historical mean.
- plot histograms of current and historical NDVI data.

These data and utilities are fundamental for crop yield forecasts and can serve as an early warning system for regions suffering from crop loss and food shortages.

Global Cropland Masks Used by the USDA/NASA GLAM-MODIS Viewer
Crop mask functionality within MODIS NDVI — view enlarged image.

Croplands are highly variable both temporally and spatially. Croplands vary from year to year due to events such as drought and fallow periods, and they vastly differ across the globe in accordance with characteristics such as cropping intensity and field size.

To successfully monitor worldwide agricultural regions and provide accurate agricultural production assessments, it is important to clearly represent the spatial distribution of global cropland regions. To do this , the USDA/NASA GLAM-MODIS Viewer uses the best available cropland masks to help monitor global crop condition during the growing season.

Recent global cropland masks added to the GLAM-MODIS Viewer are the spatial Production Allocation Models(SPAM) data sets developed by IFPRI(International Food Policy Research Institute), CGAIR ( formerly Consultative group on International Agricultural Research), IIASA (International Institute for Applied Systems Analysis) and Harverst Choice. The twelve SPAM crop types added to the GLAM-MODIS Viewer includes barely, corn, cotton, millet, palm, peanut, rapeseed, soybean, sunflower, rice, sorghum, and wheat.

GLAM Contact Information

Dept. of Geography
University of Maryland
Principle Investigator
Chris Justice
Dept. of Geography UMD
Mark Sullivan
Dept. of Geography UMD
Inbal Reshef
Dept. of Geography UMD
Compton Tucker III
Assaf Anyamba
Jennifer Small
Ed Pak
Rapid Response
Jeff Schmaltz
Division Director
Ronald Frantz
Global Crop Production Estimates
Curt Reynolds
Global Crop Production Estimates
Bob Baldwin
Information Services Division (ISD)
Project Manager
Bradley Doorn

GLAM Links