Data Set Characteristics
Area = ~ 10° x 10° lat/long
Image Dimensions = 2 (1200x1200 row/column)
Average File Size = 16 MB
Resolution = 1 kilometer
Projection = Sinusoidal
Processing Level = 2G
Data Format = HDF-EOS
Science Data Sets (SDSs) = 5
Color
Observation Coverage
Violet
0 to 10%
Sienna
11 to 20%
Purple
21 to 30%
Maroon
31 to 40%
Magenta
41 to 50%
Cyan
51 to 60%
Yellow
61 to 70%
Blue
71 to 80%
Green
81 to 90%
Red
91 to 100%
Color
Granule Pointers
Red
1
Blue
2
Cyan
0
Black
255
Product Description
The MODIS Level 2 Gridded (L2G) land data storage methodology was developed to
satisfy the diverse needs of the MODIS land product generation algorithms, to
enable efficient processing and reprocessing of MODIS land products, to
facilitate the development of terrestrial remote sensing algorithms and science
using MODIS land data, and to provide users with the original sensed MODIS
observations and their sub-pixel geolocation information.
The L2G data structure
stores information concerning the Level 2 (L2) observations that fall within
each Level 3 (L3) grid cell over a 24 hour (GMT) period. The measured L2
geophysical parameter and the sensing geometry information are stored for each
observation. The observation coverage, the area of the intersection of the
observation and each overlapping grid cell in the tile, is computed and stored
in the MODPT1KD product. The original 1-km L2 product line and sample numbers of
each observation are also stored. The images displayed represent day-mode L2G information acquired over the western coast of North America on June 9, 2000. The first image is of the
observation coverage and the second contains the granule pointer, a pointer to
the granule from which each observation was obtained. The observations stored in
the L2G products are examined by the L3 processes to help extract the most
relevant observations falling over each grid cell.
NOTE:
The later versions of these products are validated, meaning that product
uncertainties are well defined over a range of representative conditions. Although there may be later improved versions, these data are ready for use in scientific publications.
LP DAAC User Services
U.S. Geological Survey (USGS)
Earth Resources Observation and Science Center (EROS)
47914 252nd Street
Sioux Falls, SD 57198-0001