The new MODIS 250 m land-water mask (Short Name: MOD44W) is an improvement over the existing MODIS Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR) and MODIS land cover-based global land-water mask (Salomon et al., 2004). The MODIS NBAR and land cover–based mask was itself an improved version of the EOS DEM-based land-water mask (Logan et al., 1999). The new MODIS 250 m mask is primarily created with three different data inputs:
Other appropriate and publicly available data sets were also used to supplement the production of the MODIS 250 m land–water mask. Additional details regarding the methodology are available in the User Guide.
This marks the first time that such a global MODIS-SRTM land-water mask is offered publicly to end-users. This data set is provided in the same gridded tile structure that is common to several higher-level MODIS land products.
250 m Land-Water Mask HDF Science Data Set Layers
|Science Data Set||Units||Data-Type||Fill Value||Valid Range|
|Water Mask||None||8-bit Unsigned||255||0–255|
|Water Mask QA||None||8-bit Unsigned||255||0–255|
250 m Land-Water Mask HDF Science QA Legend
|1||SRTM Water Body Dataset (SWBD) water|
|2||MODIS 250 m Water-hits water|
|3||MODIS 250 m Decision-tree water|
|5||Mosaic of Antarctica (MOA) water|
|253||Area outside of projection|
MODIS Land Products
MODIS Standard Data Products Catalog
EOS Data Products Handbook Volume 1 (2000)
|Earth-Gridded Tile Area||~10° x 10° (at the equator)|
|Image Dimensions||4800 x 4800 rows/columns|
|File Size||~250 KB|
|Science Data Sets (HDF SDS Layers)||2|
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For information on how to cite LP DAAC data, please see our Data Citations page at https://lpdaac.usgs.gov/about/citing_lp_daac_and_data.
Data Pool: The Data Pool (On-line Archive) provides access to all MODIS products, and a rolling archive of ASTER level-1B products that cover the U.S. and its Territories.
Reverb: This tool provides access to a complete data record of all MODIS and ASTER products available from the LP DAAC.
The Data Access section of this Web site also provides access to these interfaces.
LP DAAC User Services
U.S. Geological Survey (USGS)
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