Metadata for Alaska AVHRR greenness metric data sets
Metadata:
| Identification_Information: | |
| Citation: | |
| Citation_Information: | |
| Originator: | USGS/EROS Alaska Field Office |
| Publication_Date: | 20000209 |
| Title: | Metadata for Alaska AVHRR greenness metric 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: | Various greenness metric data from composited, multitemporal Advanced Very High Resolution Radiometer (AVHRR) data sets for Alaska were produced for 1991 to 1999. This involved consideration of the satellite sensors used, data processing performed, and data set compilation, along with an analysis of acquisition date. The metric data sets include maximum NDVI for the year (max), date of maximum NDVI (maxjd), mean NDVI for the year (mean), end of season Julian date (lastjd), end of season NDVI (lastnd), onset of season NDVI (onsetnd), julian date of onset NDVI (minday), rate of greenup based on NDVI (rguo), rate of green-down based on NDVI (rgus), and growing season days based on NDVI (totdays). More information may be found in the following references:
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
Markon, C.J., 1999, Characteristics of the Alaskan 1 km Advanced Very High Resolution Radiometer data sets used for analysis of vegetation biophysical properties: U.S. Geological Survey Open-File Report 99-401
Reed, B.C., Brown, J.F., VanderZee, D., Loveland, T.R., Merchant, J.W., and Ohlen, D.O., 1994, Measuring phenological variability from satellite imagery: Journal of Vegetation Science, 5: 703-714
The original AVHRR NDVI data are made available on CD-ROM in byte format from the EROS Data Center in Sioux Falls, SD, USA, and used to produce these metric data. All data sets have an initial start date of April 1, but had varying ending dates (mid-September to late October) because of satellite sensor malfunction or the presence of clouds or snow; no data set extended beyond October 31.
Results of this investigation indicate that the composited data available on CD-ROM and the resulting metrics should be useful for a number of different regional assessments of Earth cover properties. However, caution is advised when using these data because (1) loss in precision from the conversion from one data format to another, (2) low sun angles and high viewing angles in the September and October data, and (3) registration inaccuracies of 2 to 8 pixels.
The data are contained in flat raster files with no blocking factors and of varying data types. The following file sizes and data types are based on an array of 2512 columns and 1992 rows.
| File Size | Data Type | File Name |
|---|
| 10007808 | Integer | lastjd1991 |
| 20015616 | Real | lastnd1991 |
| 20015616 | Real | max1991 |
| 10007808 | Integer | maxjd1991 |
| 20015616 | Real | meannd1991 |
| 10007808 | Integer | minday1991 |
| 20015616 | Real | onsetnd1991 |
| 20015616 | Real | rguo1991 |
| 20015616 | Real | rgus1991 |
| 10007808 | Integer | totdays1991 |
|
| Purpose: | Produce standardized, biweekly composited AVHRR data sets for Alaska and calculate of different phenological metrics based on NDVI data. |
| 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: byte
***** Spatial Reference Information (End) ***** |
| Time_Period_of_Content: | |
| Time_Period_Information: | |
| Range_of_Dates/Times: | |
| Beginning_Date: | 19910401 |
| Ending_Date: | 19911031 |
| Currentness_Reference: | publication date |
| Status: | |
| Progress: | Complete |
| Maintenance_and_Update_Frequency: | As needed |
| 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 Professional 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 |
| 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 2.4.33 on Fri Feb 18 15:49:42 2000
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