Global Change Master Directory gsfc-gcmduso@mail.nasa.gov 50 2013-05-21T10:15:26Z http://mddemo.gsfc.nasa.gov/KeywordSearch/OpenSearch.do 170 0 http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AK_AVHRR -179.0,51.0,-116.0,70.0 1990-06-16T00:00:00Z T00:00:00Z 2013-05-14T04:00:00Z

The goal of the Alaska Advanced Very High Resolution Radiometer (AVHRR) project is to compile a time series data set of calibrated, georegistered daily observations and twice-monthly maximum normalized ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]USAVHRR -125.0,23.0,-56.0,50.0 1989-01-04T00:00:00Z T00:00:00Z 2013-05-14T04:00:00Z

The goal of the Conterminous U.S. AVHRR project is to compile a comprehensive time series data set of calibrated, georegistered daily observations and biweekly maximum normalized difference ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]GTOPO30 -180.0,-85.0,180.0,85.0 1996-12-01T00:00:00Z T00:00:00Z 2013-05-14T04:00:00Z

Digital elevation model (DEM) data are sampled arrays of surface elevations in raster form. A DEM provides elevation values in rows and columns, corresponding to a regular grid of points on the Earth's ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NALC -175.0,5.0,-60.0,72.0 1972-07-23T00:00:00Z 1992-12-31T00:00:00Z 2013-05-14T04:00:00Z

The North American Landscape Characterization (NALC) project is a component of the Landsat Pathfinder Program, which is part of a larger Pathfinder Program initiated by the National Aeronautics ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]1_250_LULC -125.0,25.0,-67.0,48.0 1981-04-28T00:00:00Z 1992-03-04T00:00:00Z 2013-05-14T04:00:00Z

The National Mapping Program, a component of the U. S. Geological Survey (USGS), produces and distributes land use and land cover maps and digitized data for the conterminous U.S. and Hawaii. Land ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AVHRR_GLOBAL_10-DAY_COMPOSITES -180.0,-90.0,180.0,90.0 1992-04-01T00:00:00Z T00:00:00Z 2013-05-13T04:00:00Z

The Advanced Very High Resolution Radiometer (AVHRR) 1-km Global Land 10-Day Composites data set project is a component of the National Aeronautics and Space Administration (NASA) AVHRR Pathfinder ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Landsat_TM -180.0,-82.67,180.0,82.66 1982-07-16T00:00:00Z 2011-11-18T00:00:00Z 2013-05-13T04:00:00Z

The idea of a civilian Earth resources satellite was conceived in the Department of Interior in the mid-1960s. The National Aeronautics and Space Administration (NASA) ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MRLC -129.0,22.0,-65.0,49.0 1984-07-14T00:00:00Z T00:00:00Z 2013-05-13T04:00:00Z

The Multi-Resolution Land Characteristics (MRLC) project was established to provide multi-resolution land cover data of the conterminous United States from local to regional scales. A major component ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NLDC -180.0,-60.0,180.0,80.0 1972-07-28T00:00:00Z T00:00:00Z 2013-05-13T04:00:00Z

The NASA Landsat Data Collection (NLDC) is a compilation of Landsat multispectral scanner (MSS) scenes and Landsat thematic mapper (TM) scenes. This compilation of scenes represents data collections ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SAHEL_NAFR -18.0,10.0,40.0,38.0 1988-05-05T00:00:00Z 1989-12-18T00:00:00Z 2013-05-13T04:00:00Z

Following the serious grasshopper outbreaks of 1986, a pilot program was defined between the U.S. Geological Survey and the U.S. Agency for International Development. The primary goal of this program ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]WORLD_MAPS -180.0,-90.0,180.0,90.0 1883-01-01T00:00:00Z T00:00:00Z 2013-05-13T04:00:00Z

The USGS provides a series of planetary maps featuring more than 750 titles. These include selected maps of the Moon, Venus, Mercury, Mars, and the moons of Jupiter. Planetary maps are available ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AVHRR_ORBITAL_SEGMENTS -180.0,-90.0,180.0,90.0 1992-04-01T00:00:00Z T00:00:00Z 2013-05-10T04:00:00Z

The Advanced Very High Resolution Radiometer (AVHRR) 1-km Orbital Segments data set is a component of the National Aeronautics and Space Administration (NASA) AVHRR Pathfinder ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]L7CPF2 -180.0,-81.0,180.0,81.0 1999-06-29T00:00:00Z T00:00:00Z 2013-05-10T04:00:00Z

The Landsat-7 satellite was launched on April 15, 1999. The Calibration team has recently documented that the gains of the reflective bands have degraded over the past 14 years. On April 1, 2013, ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SIR-C_PRECISION -180.0,-60.0,180.0,60.0 1994-04-09T00:00:00Z 1994-10-11T00:00:00Z 2013-05-10T04:00:00Z

Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar (SIR-C/X-SAR) is a joint project of the National Aeronautics and Space Administration (NASA), the German Space Agency, Deutsche Agentur ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]USGS_MAP_INDEX -180.0,17.0,-66.0,71.0 2013-05-10T04:00:00Z

Established in 1879, the U.S. Geological Survey (USGS) has Federal responsibility for preparing multipurpose maps and fundamental cartographic data to meet the requirements of users ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]LANDSAT_MSS -180.0,-82.79,180.0,82.7 1972-07-23T00:00:00Z 1992-10-19T00:00:00Z 2013-05-07T04:00:00Z

Landsat multispectral scanner (MSS) data from the Landsat satellite series are available from the National Satellite Land Remote Sensing Data Archive located at the U.S. Geological Survey's EROS ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]DLG_LARGE -126.0,24.0,-66.0,49.0 2013-05-07T04:00:00Z

Digital line graph (DLG) data are digital representations of cartographic information. DLGs of map features are converted to digital form from maps and related sources. Large-scale DLG data are derived ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SCAR -180.0,-90.0,180.0,-60.0 1947-01-05T00:00:00Z T00:00:00Z 2013-05-07T04:00:00Z

The Scientific Committee on Antarctic Research (SCAR) collection is the largest collection of Antarctic aerial photographs in the world. Aerial photography has been acquired since 1946, ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]shuttleLFC -180.0,-90.0,180.0,90.0 1984-10-01T00:00:00Z T00:00:00Z 2013-05-07T04:00:00Z

In October 1984, the Orbiter Camera Payload System's Large Format Camera (LFC) made its maiden voyage aboard the Challenger Shuttle vehicle. The LFC was used to acquire very high resolution images ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MSS -180.0,-82.0,180.0,82.0 1972-07-25T00:00:00Z 1987-07-13T00:00:00Z 2013-05-07T04:00:00Z

The Tri-Decadal Global Landsat Orthorectified data collection consists of a global set of high-quality, relatively cloud-free orthorectified MSS, TM and ETM+ imagery from Landsats 1-5 and 7. This ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MAPS -173.0,16.0,-63.0,70.0 1883-01-01T00:00:00Z T00:00:00Z 2013-05-07T04:00:00Z

The USGS conducts systematic and scientific classification of the public lands and examination of the geological structure; mineral, energy, and water resources; and products of the national domain. ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SURVEY_PHOTOGRAPHY -177.0,-41.0,-18.0,70.0 1969-07-16T00:00:00Z T00:00:00Z 2013-05-07T04:00:00Z

The Survey inventory contains aerial photographs that are retrievable on a frame by frame basis. A majority of the inventory includes imagery that originated from the National ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]drg -124.7,24.5,-67.9,49.3 2013-05-02T04:00:00Z

A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) topographic map. The scanned image includes all map collar information. The image inside the map ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NASAPHOTOS -180.0,24.0,-60.0,72.0 1969-07-16T00:00:00Z T00:00:00Z 2013-05-02T04:00:00Z

The National Aeronautics and Space Administration (NASA) Aerial Photography data set is a film archive of photographs from the Lyndon B. Johnson Space Center (JSC) in Houston, Texas, and ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SLAR -180.0,24.0,-60.0,72.0 1980-07-18T00:00:00Z 1993-11-30T00:00:00Z 2013-05-02T04:00:00Z

Side-Looking Airborne Radar (SLAR) imagery is available from the U.S. Geological Survey (USGS) for selected project areas in the conterminous United States and Alaska. Data are X-band synthetic ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]USGS_DOQ -126.0,24.0,-66.0,49.0 2013-05-02T04:00:00Z

A Digital Orthophoto Quadrangle (DOQ) is a computer-generated image of an aerial photograph in which the image displacement caused by terrain relief and camera tilt has been removed. The DOQ combines ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]NHAP -180.0,-90.0,180.0,90.0 2013-04-29T04:00:00Z

The National High Altitude Photography (NHAP) program, which was operated from 1980 - 1989, was coordinated by the U.S. Geological Survey as an interagency project to eliminate duplicate photography ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]USGSPHOTOS -180.0,-90.0,180.0,90.0 1937-04-01T00:00:00Z T00:00:00Z 2013-04-29T04:00:00Z

The U.S. Geological Survey (USGS) Aerial Photography data set includes over 2.5 million film transparencies. Beginning in 1937, photographs were acquired for mapping purposes at different altitudes ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]CORONA_SATELLITE_PHOTOS -180.0,-90.0,180.0,90.0 1960-08-01T00:00:00Z 1972-05-31T00:00:00Z 2013-04-22T04:00:00Z

The first generation of U.S. photo intelligence satellites collected more than 860,000 images of the Earth?s surface between 1960 and 1972. The classified military satellite systems code-named CORONA, ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[USGS_EROS]ETM -180.0,-90.0,180.0,90.0 1999-06-29T00:00:00Z 2001-12-30T00:00:00Z 2013-04-22T04:00:00Z

The first generation of U.S. photo intelligence satellites collected more than 860,000 images of the Earth?s surface between 1960 and 1972. The classified military satellite systems code-named CORONA, ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]DISP -180.0,-85.0,180.0,85.0 1960-07-31T00:00:00Z 1972-05-31T00:00:00Z 2013-03-07T05:00:00Z

On February 24, 1995, President Clinton signed an Executive Order, directing the declassification of intelligence imagery acquired by the first generation of United States photo-reconnaissance ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AST14DEM -180.0,-83.0,180.0,83.0 2001-03-06T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The ASTER Digital Elevation Model (DEM) is a product that is generated from a pair of ASTER Level-1A images. This Level-1A input includes bands-3N (nadir) and -3B (aft- viewing) from the Visible Near ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ASTGTM -180.0,-83.0,180.0,83.0 2000-01-01T00:00:00Z 2011-02-28T00:00:00Z 2013-01-31T05:00:00Z

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) was developed jointly by the U.S. National Aeronautics and Space Administration (NASA) ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AST_L1B -180.0,-83.0,180.0,83.0 2000-03-04T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The ASTER Level-1B Registered Radiance at the Sensor product contains radiometrically calibrated and geometrically co-registered data for the acquired channels of the three different telescopes of ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AST14OTH -180.0,-83.0,180.0,83.0 2007-03-05T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The ASTER On-Demand Orthorectified Image products contain imagery transformed from a perspective projection to an orthogonal one. An orthorectified image possesses the geometric characteristics of ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AST13POL -180.0,-83.0,180.0,83.0 2013-01-31T05:00:00Z

This product is discontinued. The ASTER On-Demand Level-2 Polar Surface and Cloud Classification product provides a classification map discriminating between different surface and cloud features ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AST14DMO -180.0,-83.0,180.0,83.0 2007-03-07T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The ASTER On-Demand L3 DEM and Orthorectified Images form a multi-file product that contains both the Digital Elevation Model (DEM), and the Orthorectified Image products. Each product delivery includes ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]AST_L1BE -180.0,-83.0,180.0,83.0 2000-03-12T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The Expedited ASTER Level-1B Registered Radiance at the Sensor data set is produced with the express purpose of providing ASTER Science Team members data of their particular interest in quick turn-around ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD17A2 -180.0,-80.0,180.0,80.0 2002-07-04T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODerate-resolution Imaging Spectroradiometer (MODIS) Gross Primary Productivity (GPP) product (MYD17A2) is a cumulative composite of GPP values based on the radiation use efficiency concept that ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD11_L2 -180.0,-81.0,180.0,81.0 2007-01-01T00:00:00Z T00:00:00Z 2000-03-05T00:00:00Z T00:00:00Z 2003-03-06T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODIS/Aqua version-5 (V5) level-2 LST/E data (Shortname: MYD11_L2) incorporate 1-km pixels, which are produced daily at 5-minute increments using the generalized split-window algorithm. This algorithm ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD11C2 -180.0,-81.0,180.0,81.0 2002-07-08T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODIS/Aqua LST/E 8-Day L3 Global CMG product (Short name: MYD11C2) is an 8-day composited average, derived from the MYD11C1 daily global product, and stored as clear-sky LST values during an 8-day ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD11C1 -180.0,-81.0,180.0,81.0 2002-07-08T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODIS/Aqua LST/E L3 Global CMG (Short name: MYD11C1) products incorporate 0.05 degree (5600 meters at the equator) pixels, which are derived from the MOD11B1 daily global 6 km grid product, and ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD11A1 -180.0,-81.0,180.0,81.0 2002-07-08T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODIS/Aqua LST/E L3 Global 1 Km Grid (Short name: MYD11A1) products incorporate 1-km pixels, which are produced daily using the generalized split-window LST algorithm. This algorithm is optimally ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD11B1 -180.0,-81.0,180.0,81.0 2002-07-08T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODIS/Aqua LST/E L3 Global 1 km Grid (Short name: MYD11B1) products incorporate 6 km pixels (4.63 km pixels for versions prior to V005), which are produced daily using the day/night LST algorithm ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD09A1 -180.0,-80.0,180.0,80.0 2002-05-04T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODIS Surface Reflectance products provide an estimate of the surface spectral reflectance as it would be measured at ground level in the absence of atmospheric scattering or absorption. Low-level ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD09GA -180.0,-80.0,180.0,80.0 2002-07-04T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODIS Surface Reflectance products are an estimate of the surface spectral reflectance as it would be measured at ground level in the absence of atmospheric scattering or absorption. Low-level ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD09GQ -180.0,-90.0,180.0,80.0 2002-07-04T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

The MODIS Surface Reflectance products are an estimate of the surface spectral reflectance as it would be measured at ground level in the absence of atmospheric scattering or absorption. Low-level ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD14 -180.0,-80.0,180.0,60.0 2002-07-04T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

MODIS Thermal Anomalies/Fire products are primarily derived from MODIS 4- and 11-micrometer radiances. The fire detection strategy is based on absolute detection of a fire (when the fire strength ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD14A2 -180.0,-80.0,180.0,80.0 2002-07-04T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

MODIS Thermal Anomalies/Fire products are primarily derived from MODIS 4- and 11-micrometer radiances. The fire detection strategy is based on absolute detection of a fire (when the fire strength ...

http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MYD14A1 -180.0,-80.0,180.0,60.0 2002-07-04T00:00:00Z T00:00:00Z 2013-01-31T05:00:00Z

MODIS Thermal Anomalies/Fire products are primarily derived from MODIS 4- and 11-micrometer radiances. The fire detection strategy is based on absolute detection of a fire (when the fire strength ...