MODIS/Aqua Monthly Vegetation Indices Global 1x1 degree V005 (MYDVI) at GES DISCEntry ID: GES_DISC_MYDVI_V005
Abstract: Gridded MODIS vegetation indices product for northern Eurasia
The gridded MODIS vegetation indices product presents gridded statistical summaries of standard 0.05 CMG MODIS Aqua Vegetation Indices Monthly product MYD13C2 (Huete et al, 2002) collection 5. The product is intended for use in Giovanni system focused on regional (NEESPI) analysis of surface processes and climate modeling. ... The vegetation indices product is generated at 1 degree spatial resolution yearly starting from 2000. The product is generated from the 0.05 degree Climate Modeling Grid global coverage product.
The gridded MODIS land cover product includes 4 datasets representing mean vegetation indices and percentages of fill values and cells with high quality observations of the original 0.05 degree input cells within 1 degree cells.
The gridded MODIS land cover product includes the following datasets:
SDS1 mean NDVI
SDS2 mean EVI
SDS3 percent fill values
SDS4 percent GOOD quality data
Simple mean NDVI (Normalized Difference Vegetation Index) was calculated from MYD13C2 sds1 CMG 0.05 Deg Monthly NDVI only for cells within valid NDVI range. Cells with Fill_Values were not included in the analysis. The dataset is produced with full global coverage. Land/water mask is accepted from the original dataset resolution 0.05 degrees. Grid cells with no land surface are assigned the _FillValue 1.0.
Simple mean EVI (Enhanced Vegetation Index) was calculated from MYD13C2 sds2 CMG 0.05 Deg Monthly EVI only for cells within valid EVI range. Cells with Fill_Values were not included in the analysis. The dataset is produced with full global coverage. Land/water mask is accepted from the original dataset resolution 0.05 degrees. Grid cells with no land surface are assigned the _FillValue 1.0.
Percent Fill Values
Percent Fill Values is calculated from the original 0.05 degree resolution dataset as
Percent Fill Values = (Fill_Cell_Count * 100) / 400
where Fill_Cell_Count is the number of the 0.05 degree cells with the Fill Value within the 1 degree cell, and 400 is the total number of 0.05 degree cells within the aggregated 1 degree cell. The output values are rounded to the nearest integer. Percent Fill Values were calculated for each 1 degree cell. No _FillValues are assigned to this layer.
Percent GOOD Quality Data
Percent GOOD Quality Data is calculated from MYD13C2 sds13 CMG 0.05 Deg Monthly pixel reliability only for cells within the valid range of values.
Percent GOOD Quality Data = (Count_GOOD_pixel * 100) / Count_NonFill_Cell
where Count_GOOD_pixel is the number of 0.05 degree cells flagged as GOOD (value 0) quality within the aggregated 1degree cell, Count_NonFill_Cell is the number of 0.05 degree cells within the valid range of pixel reliability values within the aggregated 1 degree cell. The output values are rounded to the nearest integer. Percent GOOD Quality Data are calculated for each 1 degree cell. No _FillValues are assigned to this layer.
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Data Set Citation
Dataset Originator/Creator: GES DISC Northern Eurasian Earth Science Partnership Initiative Project
Dataset Title: MODIS/Aqua Monthly Vegetation Indices Global 1x1 degree
Dataset Release Date: 2006-11
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: NASA NEESPI Data and Service Center
Issue Identification: MYDVI
Data Presentation Form: Digital Browse DataOnline Resource: http://disc.sci.gsfc.nasa.gov/mairs
Start Date: 2002-07-01
Latitude Resolution: 1 Degree
Longitude Resolution: 1 Degree
Horizontal Resolution Range: 100 km - < 250 km or approximately 1 degree - < 2.5 degrees
Temporal Resolution: Monthly
Temporal Resolution Range: Monthly - < Annual
Distribution Media: Datafed_WCS
Distribution Format: GEOTIFF
Role: TECHNICAL CONTACT
Email: lfouse at gnis.net
USDA Agricultural Research Service 2021 South Peach Avenue
Province or State: CA
Postal Code: 93727
Creation and Review Dates
DIF Creation Date: 2006-08-14
Last DIF Revision Date: 2010-10-04