TOPS ATMT 1km GIMMS (NDVI)

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: NASA Ames Ecological Forecasting Lab
Publication_Date: 20110923
Title: TOPS ATMT 1km GIMMS (NDVI)
Edition: 1.1
Geospatial_Data_Presentation_Form: raster digital data
Online_Linkage: <http://ecocast.arc.nasa.gov/>
Description:
Abstract:
This dataset was produced by the Ecological Forecasting Lab at NASA Ames Research Center for use in the Appalachian Trail Decision Support System. The NASA Terrestrial Observation and Prediction System (TOPS) was applied to produce interpolated meteorological surfaces, and modeled data products for the Appalachian Trail. This metadata file describes the GIMMS NDVI dataset prepared by TOPS. For more information on TOPS, please see <http://ecocast.arc.nasa.gov>. For more information about the AT DSS project, see <http://www.edc.uri.edu/ATMT-DSS/>.
Purpose:
This dataset was compiled for research and evaluation purposes only. This data is intended solely for use in modeling studies to understand and predict potential drivers of recent and future changes in ecosystem boundaries and the range of individual species.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19810701
Ending_Date: 20061231
Currentness_Reference: observed
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Description_of_Geographic_Extent: Appalachian Trail MEGA-transect
Bounding_Coordinates:
West_Bounding_Coordinate: -84.693180955145948
East_Bounding_Coordinate: -68.038460335040455
North_Bounding_Coordinate: 48.242173305431237
South_Bounding_Coordinate: 32.393822963838474
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: NDVI
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Appapachian Trail
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 1981-2006
Access_Constraints: None
Use_Constraints: None
Data_Set_Credit:
NASA Ames Ecological Forecasting Lab Mail Stop 232-21 Moffett Field, CA 94035
Analytical_Tool:
Analytical_Tool_Description: See <http://ecocast.arc.nasa.gov/topwp/>
Tool_Access_Information:
Tool_Access_Instructions:

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The GIMMS (Global Inventory Modeling and Mapping Studies) data set is a normalized difference vegetation index (NDVI) product available for a 25 year period spanning from 1981 to 2006. The data set is derived from imagery obtained from the Advanced Very High Resolution Radiometer (AVHRR) instrument onboard the NOAA satellite series 7, 9, 11, 14, 16 and 17. This is an NDVI dataset that has been corrected for calibration, view geometry, volcanic aerosols, and other effects not related to vegetation change. For more information, see <http://glcf.umiacs.umd.edu/data/gimms/>
Logical_Consistency_Report:
NDVI data covering the Appalichian Trail from 1981-2006 was reprocessed at an 8km resolution by the NASA Ames Ecological Forecasting Lab.
Completeness_Report: No gaps known
Lineage:
Process_Step:
Process_Description:
As described on the Global Inventory Modeling and Mapping Studies (GIMMS) website, the GIMMS normalized difference vegetation index (NDVI) data sets were generated to provide a 25-year satellite record of monthly changes in terrestrial vegetation. New features of this dataset include reduced NDVI variations arising from calibration, view geometry, volcanic aerosols, and other effects not related to actual vegetation change. In particular, NOAA-9 descending node data from September 1994 to January 1995, volcanic stratospheric aerosol correction for 1982-1984 and 1991-1994, and improved NDVI using empirical mode decomposition/reconstruction (EMD) to minimize effects of orbital drift. Global NDVI was generated to provide inputs for computing the time series of biophysical parameters contained in the International Satellite Land Surface Climatology Project (ISLSCP) Initiative II collection. NDVI is used in climate models and biogeochemical models to calculate photosynthesis, the exchange of CO2 between the atmosphere and the land surface, land-surface evapotranspiration and the absorption and release of energy by the land surface. For more information, see <http://glcf.umiacs.umd.edu/data/gimms/>
Process_Date: 20110923

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 198
Column_Count: 138

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conic Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 29.5
Longitude_of_Central_Meridian: -96
Latitude_of_Projection_Origin: 23
False_Easting: 0
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 8000
Ordinate_Resolution: 8000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Spheroid
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: NDVI
Entity_Type_Definition: Normalized Difference Vegetation Index
Entity_Type_Definition_Source: Global Inventory Modeling and Mapping Studies

Metadata_Reference_Information:
Metadata_Date: 20121217
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NASA Ames Ecological Forecasting Lab
Contact_Address:
Address_Type: mailing
Address: Mail Stop 232-21
City: Moffett Field
State_or_Province: CA
Postal_Code: 94035
Contact_Voice_Telephone: 650-604-2787
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999

Generated by mp version 2.9.16 on Wed Dec 19 19:52:14 2012