Metadata for Alaska AVHRR data sets

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: USGS/EROS Alaska Field Office
Publication_Date: 20010718
Title: Metadata for Alaska AVHRR data sets
Edition: 1
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Anchorage, Alaska, USA
Publisher: USGS/EROS Alaska Field Office
Online_Linkage: <http://agdc.usgs.gov>
Description:
Abstract:
Advanced very high resolution radiometer (AVHRR) satellite data were acquired and composited into 14 day periods from 31 March 2000 to 12 October 2000 to map vegetation characteristics over the Alaskan landscape. Unique spatial and temporal qualities of the AVHRR data provide information that leads to a better understanding of regional biophysical characteristics of vegetation communities and patterns. These data provided synoptic views of the landscape and depicted phenological diversity, temporal vegetation phenology (green-up, peak of green, and senescence), photosynthetic activity, and regional landscape patterns. Products generated from the AVHRR composited data include a number of phenological datasets as described below. These time-series data provide opportunities to study phenological processes at small landscape scales over time periods of weeks, months, and years. Regional patterns identified on some of the maps are unique to specific areas; others correspond to biophysical or ecoregional boundaries. The data provide new insights to landscape processes, ecology, and landscape physiognomy that allow scientists to look at landscapes in ways that were previously difficult to achieve.

These data are flat binary files. Phenological metrics in this data set along with data type and file size include:

Date of onset of Greenness (minday2000.gz) integer 10007808 bytes Date of sensecence of greenness (lastjd2000.gz) real 20015616 bytes Date of maximum greenness (maxjd2000.gz) real 10007808 bytes Total days of greenness (totdays.gz) real 20015616 bytes Maximum NDVI for greenness year (max2000.gz) real 20015616 bytes Mean NDVI for the greenness year (meannd2000.gz) real 20015616 bytes Onset NDVI of greenness (onsetnd2000.gz) real 20015616 bytes Senescence NDVI value of greenness (lastnd2000.gz) real 20015616 bytes Rate of green-up (rguo2000.gz) real 20015616 bytes Rage of green-down (rgus2000.gz) real 20015616 bytes

For other reference, please see in addition to those listed on the web page <http://agdc.usgs.gov/data/usgs/erosafo/ak_avhrr/akavhrr_ndvi.html:>

Markon, C.J., Fleming, M.D., and Binnian, E.F., 1995, Characteristics of vegetation phenology over the Alaskan landscape using AVHRR time series data: Polar Record, 31:179-190

Purpose:
Produce standardized, composited AVHRR derived NDVI phenology data sets for Alaska.
Supplemental_Information:
Albers Equal-Area Conic First standard parallel 55 00 00 N Second standard parallel 65 00 00 N Longitude of central meridian -154 00 00 W Latitude of origin 50 00 00 N False easting 0 False northing 0 Units of measure Meters Pixel size 1,000 meters For Alaska Center of pixel (1,1) ( -977000, 2422000 ) Number of lines 1,992 Number of samples 2,512 Albers meters for minimum bounding rectangle: Lower Left ( -977000, 431000 ) Upper Left ( -977000, 2422000 ) Upper Right ( 1534000, 2422000 ) Lower Right ( 1534000, 431000 ) Geographic decimal degrees: Lower Left ( -168.5970, 52.9222 ) Upper Left ( -179.8476 70.0416 ) Upper Right ( -116.0057 67.6962 ) Lower Right ( -131.5953 51.5372 ) Geographic degrees, minutes, and seconds: Lower Left ( -168 35' 49" 52 55' 20" ) Upper Left ( -179 50' 51" 70 02' 30" ) Upper Right ( -116 00' 21" 67 41' 46" ) Lower Right ( -131 35' 43" 67 32' 14" )

***** Spatial Reference Information (Beg) *****

Projection Parameters

Spatial Information Raster: Number of Columns: 2512 Number of Rows: 1992 Pixel Resolution (m): 1000 Data Type: varies by data set

***** Spatial Reference Information (End) *****

Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20000331
Ending_Date: 20001012
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -179.8476
East_Bounding_Coordinate: -116.0057
North_Bounding_Coordinate: 70.0416
South_Bounding_Coordinate: 51.5372
Keywords:
Theme:
Theme_Keyword_Thesaurus: Theo
Theme_Keyword: land classes
Theme_Keyword: land cover
Theme_Keyword: plant characteristics
Theme_Keyword: terrestrial ecosystems
Place:
Place_Keyword_Thesaurus: Dictionary of Alaska Place Names, USGS Prof Paper 567
Place_Keyword: Alaska
Place_Keyword: USA
Temporal:
Temporal_Keyword_Thesaurus: USGS/EROS-AFO KEYWORD THESAURUS
Temporal_Keyword: Growing Season
Access_Constraints: None
Use_Constraints: Full acknowledgement to USGS/EROS Alaska Field Office
Browse_Graphic:
Browse_Graphic_File_Name: None
Browse_Graphic_File_Description: None
Browse_Graphic_File_Type: None
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Carl Markon
Contact_Organization: USGS/EROS Alaska Field Office
Contact_Address:
Address_Type: Mailing and Physical Address
Address:
4230 University Drive Suite 230
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99507-4664
Country: USA
Contact_Voice_Telephone: 907-786-7023
Contact_Facsimile_Telephone: 907-786-7036
Contact_Electronic_Mail_Address: markon@usgs.gov
Resource_Description: Statewide AVHRR data sets
Distribution_Liability:
Some U.S. Geological Survey (USGS) information accessed through this page may be preliminary in nature and presented without the approval of the Director of the USGS. The information and data provided is with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
Metadata_Reference_Information:
Metadata_Date: 20000209
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Carl Markon
Contact_Organization: USGS/EROS Alaska Field Office
Contact_Address:
Address_Type: Mailing and Physical Address
Address:
4230 University Drive Suite 230
City: Anchorage
State_or_Province: Alaska
Postal_Code: 99507-4664
Country: USA
Contact_Voice_Telephone: 907-786-7023
Contact_Facsimile_Telephone: 907-786-7036
Contact_Electronic_Mail_Address: markon@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.6.0 on Wed Jul 18 10:29:45 2001